更正第5题!
1.that → if/whether
如果主句是肯定句,则doubt的宾语从句必须用if/whether“是否”来引导.
2.取得being
主动句为：Somebody caught him cheating in the exam.
该句变为被动句时,不能在cheating前面加上being.
3.build → building
be opposed to...“反对...”中的to是介词,所以其后接动名词building,而不能接动词原形build.
4.conclude → contain
conclude意思是“完成/缔结/推论”,而contain才是“包含/含有”的意思.
5.去掉when（reveived估计被楼主错打成receive了）
the moment就是一个连词,引导时间状语从句,意思是“一...,就...”.
其后无须再加从属连词when.