题目内容
12.Who__________ this book__________?( )| A. | did,written | B. | was,written by | C. | do,written |
分析 这本书是谁写的?
解答 答案:B.考查助动词.某人写书"sb writes a book".书被人写"a book is written by sb",by在被动语态中后面加动作的执行者.A选项助动词did后跟动词原形.C选项助动词do后也跟动词原形,因此都不正确.这里应该用一般过去时态的被动语态,结果是was/were+动词的过去分词.答案是B.
点评 助动词,帮助实义动词构成否定句和一般疑问句的,要根据时态,人称等选择正确用法完成试题.
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