专业钻深水井:几个英语选择题,可以告诉我选它们的理由吗?

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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……

1.over指横跨在上面。如 a bridge over the river
on指在上面(接触)。如 a book on the table
above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 转化来的固定搭配,指擅长某事

3.between意思是在...之间,difference 常与between连用。本题中虽然是三者,但比较时是两两比较其颜色的不同,所以用between
in指的是在哪方面。

我的回答满意吗?