帮忙做下几道英文单选1． Sir Denis,who is 78,has made it known that much

帮忙做下几道英文单选
1． Sir Denis,who is 78,has made it known that much of his collection ______ to the nation.
A) has left B) is to leave
C) leaves D) is to be left
2.Until then,his family _______ from him for six months.
A) didn’t hear B) hasn’t been hearing
C) hasn’t heard D) hadn’t heard
3.Sometimes very young children have trouble ______ fact from fiction and may believe that such things actually exist.
A) having separated B) to separate
C) separating D) for separating
4.Tryon was extremely angry,but cool-headed enough to ________storming into the boss’s office.
A) turn B) avoid
C) prohibit D) prevent
5.The second book was ______ by August 1952,but two years later,the end was still nowhere in sight.
A) to have been completed B) to complete
C) to have completed D) completed
6.The room is in a terrible mess; it ______ cleaned.
A) wouldn’t have been B) shouldn’t have been
C) mustn’t have been D) can’t have been
7.By success I don’t mean ______ usually thought of when that word is used.
A) what is B) that we
C) as you D) all is
8.Living in the central Australian desert has its problems,_______ obtaining water is not the least.
A) for which B) of which
C) to which D) in which
9.Although many people view conflict as bad,conflict is sometimes useful _______ it forces people to test the relative merits（价值,优点）of their attitudes and behaviors.
A) by which B) to which
C) in that D) so that
10.Never before _______ so highly successful in his attempts to modify the weather on a very small scale.
A) man has been B) will be man
C) man is D) has man been

DDCBA DABCD
大部分在网上可以搜到的,你可以试一下
1.be to表示将来要
2.过去完成时,注意Until then
3.have trouble (in) doing,还有个说法to do 也可以
4.avoid doing 避免了干某事
5.过去的打算,后半句表示未实现
6.一些固定用法,有些语态有固定的用词
7.don't mean不明白,后面是疑问语气
8.obtaining water is not the least of the problems
9.好麻烦,在后半句的情况下是有用的,that引导的从句作in的宾语
10.never放句子前面,倒装结构