34.句中"he thinks"可视为插入语,只有who与whoever可做主语而作can do the job most adequately的主语,你能错选到C,答案当然是whoever
35.so trivial and few as 相当于一个形容词,且作表语!句型是sth be+adj.+to be done某事很…被做.后句与sth be difficult to be distingushed如出一辙!
36.that引导的是同位语从句,后句中students got injured or killed while in school.是对frequent reports 的具体阐述说明!
38.该句式是时间状语从句.切记：the first time /the moment/the instant /everytime,等词是状语从句的标志,同样引导的还有when/while/before,
40.为宾语从句.引导词应是作地点状语,故应填where
25.为时间状语从句.在when/before,根据句意,特别是在涉及到随堂练习的时候,这种方法极为正确.故用when.区别一下before：Correct the errors on your papers _____ you hand it in.这时就填before了!
30.To have made more efforts 作目的状语.如果选A或B的话,句中必须无and.C无实意.
34.注意burn作不及物动词时式 着火；燃着 的意思（词典中查得）如Dry wood burns easily干柴易燃.不及物动词当然就没被动形式了.主语就是易燃物了.
38.本句是一单句!主语是the growth的of及后面都是主语的定语.缺少谓语动词,其单复数形式依主语而定,the growth是滋生；发展 取抽象之意 即不可数名词,在BD中选D啦!