题目内容
句型转换
A number of people off the beaches were attacked by sharks last year. (变为否定句)
A number of people off the beaches ________ ________ ________ by sharks last year.
答案：
解析：
提示：
解析：
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were, not, attacked |
提示：
|
解题点拨 一般过去时被动语态的否定形式是在 was/were后直接加not. |
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