[ take, make, do ]
They are ________________ research on the life of the famous composer.
A. taking
B. making
C. doing
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Tenses › ViewWe __________ all day, so we decided to rest.
A. had been hiking
B. have been hiking
C. were hiking
D. hike
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You____________ forget to pay the rent tomorrow. The landlord is very strict about paying on time.
A. don’t have to
B. couldn’t
C. mustn’t
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A. so
B. because
Present Perfect Tense and Simple Past Tense › View
Ken __________ already __________ his friends to his birthday party. He is very excited now.
A. has invite
B. has inviting
C. has invited
D. have invited