.大哥大姐帮帮小弟吧..25.But for your help we ______ in the experiment.A.hadn’t had succeeded B.didn’t have succeededC.couldn’t have succeeded D.can’t have succeeded26.-- "Why didn't you buy a new car?" --"I would have bought one if I__________enough money."A.had B.have hadC.would haveD.had had27.His advice that we_____________the other groups to a friendly competition was refused.A.challengeB.shall challengeC.would challengeD.will challenge28.If a better mater

.大哥大姐帮帮小弟吧..
25.But for your help we ______ in the experiment.
A.hadn’t had succeeded
B.didn’t have succeeded
C.couldn’t have succeeded
D.can’t have succeeded
26.-- "Why didn't you buy a new car?"
--"I would have bought one if I__________enough money."
A.had
B.have had
C.would have
D.had had
27.His advice that we_____________the other groups to a friendly competition was refused.
A.challenge
B.shall challenge
C.would challenge
D.will challenge
28.If a better material ________,the strength of the part would have been increased.
A.had been used
B.had been using
C.being used
D.using
29.They made a request that the problem ___________ at the meeting.
A.discussed
B.is discussed
C.would be discussed
D.be discussed
30.It is demanded that he____________the truth.
A.tells
B.will tell
C.told
D.tell
31.How well the coat fits!
A.陈述句
B.疑问句
C.祈使句
D.感叹句