1. ________ help me, I had to do it all alone.
A.There is no one to
B.There being no one to
C.Being no one
D.With no one
【翻译】没有人帮助我，我必须自己一个人做那件事情。
[考点]非谓语动词
【精析】B 独立主格结构题：本句中There being no one to help me是分词的独立结构，相当于一个表示原因的状语从句。
2.The research scientists often meet with problems _______new types of instruments for their solution.
A.require
B.to require
C.required
D.requiring
【翻译】研究专家们常常会遇到需要运用新型仪器来解决的问 题。
[考点]非谓语动词题
【精析】D 这里考查的是非谓语形式做定语的用法,即现在分词做 problem 的后置定语。如果用 require 就变成有两个谓语了。这里相当于用了定语从 句:which requires。
3.At the bus stop ________a policeman and two young people on their way to the train station.
A.sits and waits
B.is
C.were
D.was
【翻译】在公共汽车站的那个警察和两个年轻人要去火车站。
[考点]句法结构
【精析】C 本题介词短语位于句首，其后是倒装结构，真正主语是a policeman and two young people，因此谓语应用复数形式。
4.Who do you think I ________ in the library this morning?
A.ran in B.ran down C.ran across D.ran over
【翻译】你猜我今天早上在图书馆遇见谁了?
[考点]词义辨析
【精析】C run across意为“与(某人)不期而遇，偶然遇上”;run in意为“试车”;run down意为“撞倒，停止运转”;ran over意为“碾过，快速阅读(或练习)”。
5. It isn't cold enough for there ________ a frost tonight, so I can leave my car outside safely.
A.would be B.being C.was D.to be
【翻译】天还不太冷，今晚不会下霜，我可以放心地把车停在外边。
[考点]句法结构
【精析】D “形容词+enough”后面一般接to do结构。介词for用来引出不定式的逻辑主语。
