（）weshoulddotoprotectwildlife.A.doyouthinkwhatB.doyouthinkhowC.whatdoyouthinkD.howdoyouthinkDoesMrs.Smithteachinthisschool?No.Butshe()A.usedtoB.usedtobeC.usedtoteachD.wasusedto()attheschoolgateisasking

Question

（ ）we should do to protect wildlife.A.
do you think what B.do you think how C.what do you think D.how do you think
Does Mrs.Smith teach in this school?No.But she( )
A.used to B.used to be C.used to teach D.was used to
( )at the school gate is asking to see you.
A.some man B.a some man C.certain man D.some a man

Answer 1

以后再提问,请把题目编号加上,这样看得清晰些.
我们试着就这句话括号中的部分进行提问：I think we should do (sth.)to protect wildlife.
便可以得到本题的答案C,What do you think we should do to protect wildlife?
used to 后加不定式表示”过去常常“,答语中需要用其省略形式,仅仅保留used to即可,故答案是A
some修饰可数名词复数或者修饰不可数名词时,意思是”一些“,但是当它用来修饰可数名词单数时,则表示”某一个“的意思,等于a certain.故本题答案是 A.= A certain man,而C选项缺少了个不定冠词a,所以是错的.