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）