The video cameras are so nice.I really don't know_______.

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/07/08 12:31:35

The video cameras are so nice.I really don't know_______.
A.how to choose B.what to choose
C.to choose which D.which to use
参考答案选D,为什么?
which不是只能引导定语从句吗？为什么这里可以引导宾语从句？

【答案】 D.which to use
I really don't know which to use我不知道选哪一个
which充当know的宾语
which既作代词,又有它本身“哪一个”的含义,所以不用what how
不定式to choose作后置定语修饰宾语which
which也能引导宾语从句,但这句不是【这句俗称简单句】,若改成宾语从句,如下：
I really don't know which video I should choose.

The video cameras are so nice.I really don't know_______. We really don't know_______.() I lost the key ,and I really don't know_______.A what should Wow!There are so many books in the bookstore; I don't really the shops are too crowded ,so i don't really enjoy it. l'm sorry,l really don't know_______ in the meeting I don't like the skirts .___of them are nice. People don't know_______ There are so many interesting books here.I really don't know there are so many good nevels here,i really don"t know _____ The maths problem is so hard.I really don't know ______. The maths problem is so hard,I really don't know ____.A.how