18．——would you like to go and see the film with me this evening?——I am sorry I can’t beca

问题补充：

18．——would you like to go and see the film with me this evening?

——I am sorry, I can’t because I my homework.

A. does

B. did

C. am doing

D. has done

答案：

A. does

B. did

(答案→)C. am doing

D. has done

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