By the time the meeting started, everyone _____ (already arrive). ...

★ Past Narrative Tenses

By the time the meeting started, everyone _____ (already arrive).

A. has already arrived

B. already arrived

C. was already arriving

D. had already arrived

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I _____ (study) all morning, so I’m going to take a break now.

A. studied

B. have studied

C. was studying

D. have been studying