Last month, Rohan and Emma were working on a project ...

[ Perfect Verb Tenses ]

Last month, Rohan and Emma were working on a project when YAZAN noticed that one of the machines failed to measure the migration patterns. Can you identify the tense used in this sentence?

A. Past perfect tense

B. Present perfect tense

C. Future perfect tense

D. Past tense

Select your answer:

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