I‘m not sure which classroom ______.A.to attend lecture B.to have lecture at C.to have lecture in D.having lecture in为什么不选D?

来源:学生作业学帮网 编辑:学帮网 时间:2024/05/15 14:32:30

I‘m not sure which classroom ______.
A.to attend lecture B.to have lecture at
C.to have lecture in D.having lecture in
为什么不选D?

sure to do something

因为which引导了一个一般现在时性质的从句,不能用现在进行时having。

因为这里要用动词不定时作CLASSROOM的定语。