1.I'm getting tired--it's time we (B) home .

1.I'm getting tired--it's time we (B) home .
A.go B.went C.will go D.are going
问：为什么要用过去式?是it's time+虚拟语气的固定格式?
2.I won't tell you my secret unless you (A) not to tell anyone.
A.promsing B.promised C.are promising D.are going to promise
问：为什么会是promising?不是promise?
3.I (B) old Mrs Smith has lost her dog.
A.heard B.hear C.am hearing D.will hear
问：这道题跟it is said不一样吗?而且后面说的是“has”lost her dog,前面不应该是过去时吗?
4.Having been delayed by heavy traffic,(C).
A.it is impossible for her to arrive on time B.it led to her being later C.she arrived late D.her friend thought she would be late
问：A有何不托?
5.Why are you taking up that floor board?
I (C) my money under the floor,I don't trust banks.
A.will B.put C.am going to put D.have put
问：B或C为什么不对?我把钱放在地板下面了,我可不相信银行,听上去也很对呀?
6.Just as we reached the bus stop,the bus (A) by us.
A.passed B.had passed C.was passing D.would pass
问：就在我们到达车站的时候汽车开走了,也就是说汽车正在开走,用was passing不对吗?passed不是过去时吗?表示汽车已经不在了,究竟是怎么一回事?
7.While Mary and I____(wash) up,she ____(ask)me to be quiet as our neighbors ____(sleep).were washing,asked,were sleeping
问：while的用法不是.is doing .while.is doing.前后都是doing,为什么用asked?为什么is doing放在sleep那里,而不是ask呢?
8.I'd rather you (D) such a thing.
A.haven't done B.won't do C.are going to do D.hadn't done
问：haven't done哪里不对?
9.Sally (A) it if she doesn't want to.
A.need not do B.needs not to do C.need not does D.needs not do
问：C不对吗,而且是第三人称单数,不应该用does吗?是因为need后面就应该跟原型do吗?
10.He (D) his parents about his failure in the examination.
A.dares not tell B.dares not to tell C.is not daring to tell D.dare not tell
问：书上说dare作一般动词用时,其后既可用带to的不定式,也可用不带to的不定式,那什么时候有to,什么时候不带to?还有A为什么不对?为什么不能加s?
11.You (C) pass the exams before you could enter the college.
A.has to B.must C.had to D.need
问：must为何不行?
12.You (D) to have done silly things.
A.had ought B.hadn't ought C.didn't ought D.ought not
问：have done不是过去式吗?B或C为何不对?
第五个 我掀开地板不一定仅是要往里面放钱 也可以以前在里面放的钱 现在掀开地板想要拿钱 这样理解不妥吗 （我这人死脑筋 请不要见笑 呵呵）

1.
是的,凡是看到its time (that)...或its high time (that)...都是过去式
2
问：为什么会是promising?不是promise?
首先答案里也没有promise,promise是正确的,现在你可以把until理解成介词,相当于except,“除非在你答应的情况下否则我不告诉你“,你可以去查字典unless既是连词也是介词.（这题很没意思,纯属考试类型）
3.I (B) old Mrs Smith has lost her dog.
A.heard B.hear C.am hearing D.will hear
问：这道题跟it is said不一样吗?而且后面说的是“has”lost her dog,前面不应该是过去时吗?
has done是现在完成时,所以时态一致当然前面是现在式阿,如果是heard,那么后面就是had lost
4.
Having been delayed by heavy traffic,这句分句的主语是什么?是she,所以了主语要一致,不可用it主语的句子.
5.
问：B或C为什么不对?我把钱放在地板下面了,我可不相信银行,听上去也很对呀?
因为你正在taking up the floor board,说明你将要把钱放进去但还没有放阿.
6.
问：就在我们到达车站的时候汽车开走了,也就是说汽车正在开走,用was passing不对吗?passed不是过去时吗?表示汽车已经不在了,究竟是怎么一回事?
请问公车在车站停了吗?如果你刚到站,车来了却没有停直接开过去了,那种情况叫was passing,你到站,车已经开了,passed.
7.
问：while的用法是.be doing .while.be doing.不是一定要现在进行时的,ask是瞬间动词,sleep是持续动词,这就是区别.
8.I'd rather you (D) such a thing.
A.haven't done B.won't do C.are going to do D.hadn't done
i would rather ,虚拟或可以说过去式,时态一致
9.
问：C不对吗,而且是第三人称单数,不应该用does吗?是因为need后面就应该跟原型do吗?
这里need 相当于can 这种情态动词,你会说she cannot does吗?所以拉
10
问：书上说dare作一般动词用时,其后既可用带to的不定式,也可用不带to的不定式,那什么时候有to,什么时候不带to?还有A为什么不对?为什么不能加s?
如果你要选a的话,正确的答案是does not dare,dare既是不及物动词（ dare to do sth),也是及物动词（dare sb to do/dare sth),判断到底是不是及物就可以了.
11.You (C) pass the exams before you could enter the college.
A.has to B.must C.had to D.need
问：must为何不行?
怎么说呢,这里更强调被动的趋势,你不得不通过,不通过就不行.语感也很重要的.
12.You (D) to have done silly things.
A.had ought B.hadn't ought C.didn't ought D.ought not
问：have done不是过去式吗?B或C为何不对?
再次说明have done不是过去式,是现在完成式,请一定不要搞错了,并且ought (to)是情态动词,由此就可以判定abc都是不可能的.