题目内容：

We should treasure our friends by their aid when they are in trouble
A.going to B.turning to C.dropping to D.failing to
为什么选择A
4个选项的用法和区别?

优质解答

理解句意：我们应当珍惜自己的朋友,当他们遇到困难时我们应当给予援手.
AB都是朋友帮你,而D是失败了,只有C选项符合题意