1:The teacher demanded that the exam____before eleven.

1:The teacher demanded that the exam____before eleven.
A:must finish B:would be finished C:be finished D:must be finished
2:He is talking so much about America as if he ____there.
A:had been B:has been C:was D:has gone
3:The suggestion has been made____the basketball game____put off.
A:for;to B:that;be C:which ;should be D:to ;being
4:It is important that we ____wild animals.
A:will protece B:should protece C:shall protecet D:are protecting
5:Had you listened to the doctor,you____all right now.
A:are B:were C:would be D:would have been
6:____today,he would get there by Friday.
A:Would hr leave B:Was he leaving C:Where he to leave D:If he leace
7:Should it rain ,the crops____.
A:would be saved B:would have been saved C:will be saved D:had been saved
8:You____come earlier .The bue left a moment ago.
A:would B:should have C:may D:have
9:I_______you some money,but I hadn't any on me then.
A:would lend B:would have lent C:could lend D:may have lent
10:-Have you ever been to Beijing?
-No,but I wish I_____.
A:have B:will C:do D:had
11:I'm glad I went over all my notes;otherwise____
A:I may have failed B:I'd fail C:I'd have faild D:I'll have failed.
12:-What will you do during the summer holiday?
-I don't know ,but it's high time ____sth.
A:I'm deciding B:I'll decide C:I decided D:I decide
13:If only i ____my watch!
A:hadn't lost B:haven't lost C:didn't lost D:don't lose
14:We ____the work on time without your help.
A:hadn't had finished B:didn't have finished C:couldn't have finished D:can't have finished
15:If it were not for the fact that you____ill,I would ask you to do this right now.
A:were B:had been C:are D:should be
(说下选择的理由,）

1. C
demand的宾语从句必须采用虚拟语气,即从句的谓语动词由“should + 动词原形”构成,且shoule可以省略.
2. A
as if引导的从句如果表示虚拟的情况时,也必须采用虚拟语气.
如果从句动作发生在主句动作之前,则从句采用过去完成时.
3. B
the suggestion的同位语从句,不缺成分时,从句用that引导；
且从句必须才用虚拟语气,即从句的谓语动词由“should + 动词原形”构成,should可以省略.
4. B
“It's important that从句”如果表示说话人的某种语气时,须采用虚拟语气,即that从句的谓语动词由“should + 动词原形”构成,should可以省略.
5. C
if引导的条件状语从句如果使用虚拟语气,从句表示对过去的虚拟时,从句用过去完成时；
主句有now,表示对现在的虚拟,则用“would/could/might + 动词原形”.
6. C
同上题.if从句如果是对将来的虚拟,从句可以用“were to do sth”,还可以把were提前至句首,并去掉if.
7. A
同上题.if从句是对将来的虚拟,从句可用“should + 动词原形”,且可以把should提前至从句句首,去掉if；
主句则采用“would/could/might + 动词原形”.
8. B
should have done sth 本应该做某事(但是实际上当时没做)
9. C
could have done sth 本可以/能够做某事(但是当时未能做到)
10. D
wish的宾语从句如果是对过去的虚拟,则从句用过去完成时had done sth.
11. C
if从句的含蓄用法,对过去的虚拟主句用would/could/might have done sth
12. C
“It's high time that从句”,that从句使用虚拟语气,即从句用一般过去时或“should + 动词原形”,此时should不可以省略.
13. A
if only句子使用虚拟语气.多过去的虚拟时,句子使用过去完成时.
14. C
同第11题.
if从句的含蓄用法.对过去的虚拟时,主句使用“would/could/might have done sth”.
15. C
if从句虽然是虚拟,但是if从句里面的那个that引导的同位语从句是事实(the fact),所以用一般现在时.