题目内容：

.Rain does not____bring down the temperature .
A.certainly B.undoubtedly C.necessarily D.completely
2.Be sure to_____your work at the end of the exam.
A.look over B.hang up C.set aside D.catch sighr of
3.There was more than_____rain and snow last year,so some parts
of the country have been flooded this spring.
A.extra B.effcient C.permanent D.adequate
4.This article deals with the natural phenomenon which____most
interesting to everyone
A.are B.is C.they are D.it is
5.I couldn't understand why he pretended_____in the bookstore.
A.to see me not B.not to see ne C.not see me D.to see not me
6.The professor paused as if_____his students to ask questions on the point he had just made.
A.expecting B.to expect C.expected D.to have expected
7.the classroom was almost empty______a desk or two.
A.besides B.except fot C.except D.in addition to
还请说明为什么选这个～