题目内容

根据句意用括号中所给动词的适当形式填空。

-What ________ you ________(do)when the bell rang?

-I ________(talk)with Mr Green.

-What ________ your brother ________(do)at the time?

-He ________(play)the piano.

答案:were,doing;was talking;was,doing;was playing
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