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Câu hỏi

Put the verbs into the suitable form, the present perfect or the present perfect progressive. A: You look tired. ............(you/ work) so hard? B: Yes. I (study) .................for four hours and probably won‟t finish until midnight.

Put the verbs into the suitable form, the present perfect or the present perfect 
progressive.

A: You look tired. ............(you/ work) so hard?
B: Yes. I (study) .................for four hours and probably won‟t finish until midnight.

H. Huong

Giáo viên

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Giải thích

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Have you been working - have been studying

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Choose the best answer. . ........................a contract last year and it is still valid.

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