题目内容：

几个英语选择题,可以告诉我选它们的理由吗?
We were flying ______the clouds and saw the blue sky.（C）
A.over B.on C.above D.up
Which subject are you best_____?(C)
----Physics.
A.on B.in C.at
Can you tell the difference______the three photos _______ color?( A )
A.between,in B.between,of
C.of,between D.of,in
between不是两者之间吗?怎么可以用between呢?
疑惑……

优质解答

1.over指横跨在上面.如 a bridge over the riveron指在上面（接触）.如 a book on the tableabove是空间概念的上方.如本题up不用做介词,是抽象的“上”.如 The rate goes up.2.be best at 是由be good at 转化来的固...