__we draw useful lessons from them,we may turn difficulties to a good account.

问题描述:

__we draw useful lessons from them,we may turn difficulties to a good account.
A,to provide B,provided C,Given D,to give.
答案选择B,其他为什么不对?

翻译:只要我们从中吸取有益的教训,困难也可以变成好事.
解析:provided conj.只要 假如;倘若 引导条件状语从句
A 为了提供
C考虑到 give 过去分词
D 为了给.
带入句子 ,只有B符合题意