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Are you sure all the windows ____?

来源:学生作业帮 编辑:作业帮 分类:综合作业 时间:2024/05/14 18:59:57
Are you sure all the windows ____?
A close B closed C have closed D have been closed
选什么?为什么?
后面要用一个句子,因此要用DAre you sure all the windows (have been closed).或者Are you sure all the windows are closed?你确定所有窗户都关好了吗?窗户要被关,因此只能用被动的,这里只有D是被动语态,其它都不...