问题
How many English words had you learned _____ the end of last term? — Around 2000, but I’ve forgotten most of them. [ ]
A: by
B: at
C: to
D:on
B: at
C: to
D:on
正确答案是：
同类题型
We have friends to help us fight against pollution, and trees are one of ________.
Don ‘t ask him to study too late into the night . _____ , he is only a small child.
Though we spent a lot, we think it _____ because we succeeded in the end.
Jane is high school student in the United States.
Michael Jordan is a basketball star. I like _______ very much.