TIM WAS TIRED. HE...HARD ALL DAY.A. HAS BEEN STUDYINGB. STUDIESC....

58. - TONG HOP BAI TAP TRAC NGHIEM VE CAC THI TRONG TIENG ANH

TONG HOP BAI TAP TRAC NGHIEM VE CAC THI TRONG TIENG ANH

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58.

Tim was tired. He...hard all day.

A.

has been studying

B.

studies

C.

studied

D.

had been studying