题目

__ make mistakes in' the exam, I went over what I had learnt again and again. A. So as not to        B. In order not to  C. In order to         D. So as to   答案：Bin order to do sth和 so as to do sth意为“为了做某事”，位于句中时用法相同，但so as to do sth不能用在句首。句意为：我反复复习我所学过的知识，以便于在考试中不出错。  The boy has been missing for five days and his parents are worried about his______.A. attention B. safety C. action D. growth B 【解析】 句意：这个男孩失踪五天了，他的父母非常担心他的安全。attention注意力；safety安全；action行动，行为；growth生长。根据句意The boy has been missing for five days可知，这个男孩失踪五天了，所以他的父母是担心他的安全，故应选B。