问题
More than two _______years ago, people knew little about the universe.
A:thousands
B:thousand
C:thousands of
D:thousand of
B:thousand
C:thousands of
D:thousand of
正确答案是：
同类题型
Can you call me when you ________ home?
Is Mr Hu in the reading room?—No, he _______be there. He has gone to Tianjin.
It’s not good to use our computers ____ computer games. [ ]
Let’s go on a camp if it _____ this weekend, Jimmy!— But nobody knows if it _____.[ ]
The judge paid no attention to ______ he had just lost his wife．