题目内容

——What are you doing? —— I am_______ a letter.

A. writing
B. written
C. wrote
D. write

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Tom is not _______his homework now.

A. doing
B. do
C. does
D. did

______he ______it to you then?

A. Does explain
B. Did explains
C. Does explains
Did explain

We _______ a lot of homework yesterday.

A. has
B. have
C. had
D. having

She sang many English songs at the party ___________.

A. every time
B. last night
C. tomorrow
D. each time

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