42.---Sorry,Joe.Ididnotmeanto…--Don’tcallme“Joe”,IamMr.Parkertoyou,andDyouforgetit!A.doB.didn’tC.didD.don’t26.Butforwater,itCimpossibletoliveintheearth.A.isB.wouldC.wereD.wouldn’tbe54.Asyouknow,

Question

42.--- Sorry,Joe.I did not mean to…
--Don’t call me “Joe”,I am Mr.Parker to you,and _D___ you forget it!
A.do B.didn’t C.did D.don’t
26.But for water,it _C___impossible to live in the earth.
A.is B.would C.were D.wouldn’t be
54.As you know,I am a disabled man,but I would be happy if I __A_of service to you.
A.am B.have been C.should be D.would be1
为什么选以上答案,分别涉及到什么知识点?

Answer 1

26.原句意思是：要不是水,就不可能存活在地球上.之所以用were,是因为虚拟语气规定了倘若空格要填be动词（前提是从句but for后面是一般现在时）,那么主句be 动词要用were不能用was.比如,But for him,I were dead.