Here is the answer key and explanation for the exercise. Check your answers carefully and review the explanations for any incorrect responses. Practicing questions and correcting mistakes are essential for MDCAT success, as they strengthen your understanding and improve accuracy. Keep learning from your errors to enhance your performance!
Q.1
Correct option: B
Explanation: “Only one of the boys” is a singular subject, so the verb must be singular: “has.” The past participle of “give” is “given,” which is correct after “has.” Hence, “has, given” is the right choice.
Q.2
Correct option: B
Explanation: “It is time we acted” uses the past tense “acted” to express a present necessity or urgency—a common idiomatic structure in English. “Act” is base form, and others do not fit grammatically.
Q.3
Correct option: B
Explanation: At the time the thief entered, the inmates were in the middle of an ongoing action—sleeping. “Were sleeping” is the correct past continuous tense for simultaneous past actions.
Q.4
Correct option: B
Explanation: The phrase “explained how he had escaped” shows that the escape happened before the explanation. Past perfect “had escaped” fits best.
Q.5
Correct option: A
Explanation: “They did not know where they had come from” uses past perfect “had come” to refer to an action completed before another past action.
Q.6
Correct option: C
Explanation: Simple past “left” is suitable here to describe an action completed at the time of death. “Had left” could also work but “left” is more concise and grammatically simpler.
Q.7
Correct option: C
Explanation: “Are to be ranked” is passive and fits with “the results will be announced.” It indicates the action has been completed or arranged.
Q.8
Correct option: B
Explanation: “Enjoyed” is followed by the gerund “watching.” This is the correct verb pattern—“enjoy + -ing form.”
Q.9
Correct option: C
Explanation: “Is elected” is correct as a present simple passive to show a recent official appointment. “Will assume” refers to a future action.
Q.10
Correct option: C
Explanation: The subject is singular (“cooperation”), so the verb should be “brings.” It’s present simple to indicate a general truth.
Q.11
Correct option: C
Explanation: “Had deposited” is past perfect, indicating the action was completed before the time he tried to remember.
Q.12
Correct option: D
Explanation: “Had been living” is past perfect continuous, which suits the context of a duration in the past continuing until another past event.
Q.13
Correct option: C
Explanation: “Came” is simple past, and is correctly used after “since” to describe an event that happened in the past.
Q.14
Correct option: D
Explanation: “Those who have objections” is followed by the present participle “discussing,” referring to people currently involved in that action.
Q.15
Correct option: C
Explanation: “Have her teeth removed” is the causative construction showing someone else did the action for her.
Q.16
Correct option: C
Explanation: “Has been repairing” is present perfect continuous to show an action that started in the past and is still continuing.
Q.17
Correct option: D
Explanation: “Would have scored” is correct in third conditional sentences (if + past perfect, would have + past participle).
Q.18
Correct option: C
Explanation: “Got used to” is followed by the gerund “driving.” This construction means he became accustomed to that action.
Q.19
Correct option: D
Explanation: Again, a third conditional. “Had you told me earlier, I would have attended.” It expresses a missed past opportunity.
Q.20
Correct option: D
Explanation: Present simple “arrives” is used for scheduled future events like train arrivals.
Q.21
Correct option: D
Explanation: “Would fail” correctly shows the feared outcome in indirect speech about the future.
Q.22
Correct option: A
Explanation: “Crept” is simple past and matches with “was washing.” The sequence of actions in the past requires this form.
Q.23
Correct option: B
Explanation: “Two-thirds of the city” is a plural fraction of a countable noun, so we use “were.”
Q.24
Correct option: D
Explanation: Third conditional—“If I had helped him, he would not have drowned.” This talks about a past hypothetical situation.
Q.25
Correct option: C
Explanation: “Smelt” is past tense and fits with the action that caused her to react.
Q.26
Correct option: D
Explanation: Third conditional again: “If you had followed the rules, you would not have been disqualified.”
Q.27
Correct option: D
Explanation: “Would have left” fits with the past conditional. The farmers didn’t know, so they didn’t leave.
Q.28
Correct option: D
Explanation: Simple past “Did you hear” is the correct way to ask about a completed action.
Q.29
Correct option: B
Explanation: “Went” is simple past for a completed action last night.
Q.30
Correct option: C
Explanation: “If I were a doctor” is the correct form in imaginary/unreal present conditional sentences.
Q.31
Correct option: A
Explanation: “Stops” is used for future time clauses (when + present simple), even though the main verb is in future tense.
Q.32
Correct option: B
Explanation: “The patient was already dead” (state) when “the doctor arrived” (action). Both are past simple.
Q.33
Correct option: B
Explanation: “Let” is followed by bare infinitive: “let them swim,” not “to swim” or other forms.
Q.34
Correct option: B
Explanation: “Watched them perform”—bare infinitive is used after sensory verbs like watch, see, hear.
Q.35
Correct option: A
Explanation: “Have been trying” shows ongoing effort from past until now.
Q.36
Correct option: D
Explanation: “Had asked” is past perfect, expressing a regretful or missed action in the past.
Q.37
Correct option: D
Explanation: “Is being” is correct to describe temporary behavior at the moment.
Q.38
Correct option: C
Explanation: “Had watched” is used in indirect speech to refer to a past action before another past reference.
Q.39
Correct option: B
Explanation: “Are manufactured” is present simple passive to describe a regular process.
Q.40
Correct option: C
Explanation: “Had to” expresses compulsion in the past.
Q.41
Correct option: D
Explanation: “Hit” is the past form of “hit” and is correct here.
Q.42
Correct option: C
Explanation: “Survived” is simple past and matches the completed action of the tragic incident.
Q.43
Correct option: C
Explanation: “Had none” correctly refers to the past possession.
Q.44
Correct option: D
Explanation: “Did” is followed by base form—“Did the child fall?”
Q.45
Correct option: C
Explanation: “Stopped” is simple past for a completed action.
Q.46
Correct option: B
Explanation: “Had woken” is past perfect, suitable for the third conditional form.
Q.47
Correct option: A
Explanation: “Assembled” is simple past, describing an action done last night.
Q.48
Correct option: B
Explanation: “Had seen” shows that the students saw the documentary before deciding.
Q.49
Correct option: A
Explanation: “Reported” is simple past for an event that happened yesterday.
Q.50
Correct option: B
Explanation: “Needs to be balanced” is passive infinitive, correctly matching with “needs” and the structure of the sentence.
