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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