计算机设计。 bring in收(庄稼)；提出；引进；bring out使显现；阐明；出版；bring up教育；培养；使成长；呕吐；give in让步； 呈交。根据句意判断答案是A项。

9．________you understand the rule，you will have no further difficulty.

A．While B．Once

C．Though D．Unless

答案与解析：B　句意：一旦明白了这条规则，就再也没有困难了。 once 一旦......就......，引导时间状语从句，相当于as soon as。

10．The government is trying to________the prices for foods in order to please people.

A．bring down B．take down

C．put down D．lay down

答案与解析：A　句意：为了使人民满意，政府正在降低物价。 bring down降低；take down放下；put down镇压；lay down放下。

11．________the Internet is bridging the distance between people, it may also be breaking some homes or will cause other family problems.

A．When B．While

C．If D．As

答案与解析：B　题目中逗号前后两部分在意义上形成对比，因此答案是B项：while表示对比或转折，意为"而；然而"。

12．-We have an unreliable source of water supply now.

-Yes, it is________short in many big cities.

A．running B．flowing

C．moving D．becoming

答案与解析：A　理解句意可判断答案是A项：run short (of...) 快用完(......)。

13．-________the naughty boy changed his mind to study at university?

-After he listened to the advice given by his teacher.

A．When was that it B．When was it that

C．When was that D．When was it

答案与解析：B　本题考查强调句的特殊疑问句结构：特殊疑问词＋is/was it that...？注意在强调句的疑问句型中，强调标志that/who后只能使用陈述语序。

14．-Could I borrow your dictionary?

-Yes, of course you________.

A．might B．will

C．can D．should

答案与解析：C　本题考查情态动词用法。could表示委婉的语气，并不为时态。答语中of course，表示肯定的语气，允许某人做某事时，用can和 ma