1.-Why are you so popular with your students?-As a teacher ,I seldom give my students so difficult a problem__thhey cannot work out.A.as B.that C.if D.which这题我选的是B,so that 这种问题我总是做错 我英语不错 ,但对语法不太清

Question

1.-Why are you so popular with your students?
-As a teacher ,I seldom give my students so difficult a problem__thhey cannot work out.
A.as B.that C.if D.which
这题我选的是B,so that
这种问题我总是做错 我英语不错 ,但对语法不太清楚 一般都是靠语感……
2.—John,how did your English exam go?
-I thought I__ ,but in fact I came in the top in the class.
A.should have failed B.couldn't have failed
C.might have failed D.mustn't have failed
我选的是A ,为什么不是 我认为我本应该不及格（实际上却没有）呢?
3.The flu is believed ____ by virus.
A.causing B.being caused C.to be caused D.to have caused
我选的是D 那么请问CD之间的区别是什么呢?

Answer 1

1.记住as在定语从句中的这种用法.主句中有so,the same,定语从句中关系词用as.明白是定语从句吧?如果填that,容易理解成so……that从句,后面也应该是work out it.所以显然不对.
2.选C吧?should have done 表责备.这里用不合适.通常是对别人责备.比如说迟到了,领导说：You should have came earlier.C能翻译通吧?
3.C是被动,D是主动,被动是to have been caused.