Question 33: Mark the letter A, B, C or D to indicate the correct answer to each of the following questions. Question 7. When he ________ an essay in on time for once, his professor __________ him a look of surprise.
Knowledge of verb tenses
To describe an action that started and ended at some point in the past, we use the past simple.
Based on the meaning of the sentence, both verbs must be conjugated in the simple past tense.
Once when he handed in his essay on time, his professor looked at him with surprise.
Other structures to note:
hand st in: submit something
give sb a look of surprise: look at someone with surprise