单选题大学英语On snow days,you have to drive very __ to avoid traff

单选题大学英语
On snow days,you have to drive very __ to avoid traffic accidents.
A.cautiously B.nearly C.smoothly D.properly
我选的A
To the ___of the citizens,no one else was infected with HIN1 flu except the 12 confirmed cases
A.relaxation B.diappointmentC.relief D.suprise
我选的C 如释重负的意思?不行吗
I have not finished my homework yet.
Speed up!we will __you another twenty minutes.
A.allow B.leave 我选的B 为什么啊
In front of our house stands a tall tree,__top well above the tops of the other trees.
A.whose B.its 我选的A 为什么,its在这里是个什么成分不太明白
另外whose只能修饰人吗

你做的这些是自考题吧?而且是拿学位时必考的英语题.
1. On snow days, you have to drive very __ to avoid traffic accidents.
A.cautiously B.nearly C.smoothly D.properly
此题最正确答案是A,你选对了.此句子出自一篇翻译考试的文章,原文是On snow days, you have to drive with caution to avoid traffic accidents.谨慎驾驶再正确不过!不过C选项也说得过去,smoothly,平稳地,顺畅地,镇静地,完全说得过去,但总感觉怪怪的.而且Smoothly一般表达一种结果：Trafiic flowed smoothly. 路上交通顺畅.She passed the examination smoothly. 她顺利的通过了考试.这道题出的很蹩脚,当初我们教研室探讨过这道题,大家都觉得出题人很二.我们定的答案是A.
2. To the ___of the citizens, no one else was infected with HIN1 flu except the 12 confirmed cases
A.relaxation B.diappointmentC.relief D.suprise
答案是C.to sb's relief 是固定短语,意为“让某人宽心的是”.【朗文高级】1930页 例句：To my relief, they spoke English.让我宽心的是他们说英语.
3. --- I have not finished my homework yet.
--- Speed up! We will __you another twenty minutes.
A.allow B.leave
答案是A.allow sb sth 固定短语 【朗文高级】53页 例句：
How much time are we allowed?我们还可以有多少时间?
而leave这个词本意是“离开”引申词组有leave sb doing sth：Never leave chidren playing near water unattended.千万别让儿童单独在水边玩耍.leave sb to sth: I'll leave you to it. 这事我就留给你做了.leave sb in peace：让某人清静,不打扰某人.其实引申词组都没有脱离“离开”这一本意.
4. In front of our house stands a tall tree,__top well above the tops of the other trees.
A.whose B.its
答案是B.判断这道题很简单：只要看划线处后边的部分是什么成分就行了.划线处后边不是句子,说明并非从句,不是从句就不能选A啦.故考虑应属于独立主格结构.若改写为：
In front of our house stands a tall tree, whose top is well above the tops of the other trees. 后边加了一个is你就能懂了吧?定语从句中的引导词whose不一定接人啊,接物也可以.
其实这句话改写成这样你更好理
In front of our house stands a tall tree, with its top well above the tops of the other trees.
with 结构你应该理解吧?
你的这些题确实有点难度,属于大学英语范畴,好好研究,其实也很好掌握的!祝你陈功!
Merry Christmas!