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问题 选择题

— Excuse me, can you spare me a few minutes?

—Sorry, I haven’t ______ time to talk to you just now. I have to leave early to catch ______ 4:30 train.

A．/; /

B．the; the

C．a; the

D．the; /

答案

答案：B

题目分析：考查冠词。第一空the time特指上文提及到上文中的a few minutes；第二空是特指的4点30的火车。句意：——打搅了，你能为我抽出几分钟吗？——对不起，我现在没有时间跟你交谈。我不得不早点离开赶上4点30的火车。故B正确。

单项选择题

One of the most convenient and cheapest ways to see America is by riding a Greyhound bus. This interstate bus system connects all major cities in the United States, (52) people with frequent and convenient service. The bus system even has an international service (53) makes connection with cities in Canada and Mexico.

Its network even extends to some of the smaller towns and out-of-the-way communities (54) the great interior of the country. Traveling by bus may (55) longer than flying by plane, but the terminals are located in the center of most cities and there is (56) to the downtown area. These buses are comfortable and air-conditioned. They are all equipped with toilets in the rear to (57) the convenience of the passengers, but there are some very severe (58) of conduct which are strictly enforced. On all buses (59) is forbidden and the consumption of alcoholic drinks is not allowed.

(60) bus travel may not be suited to everyone’s taste, it affords budget travelers the (61) to see America in comfort and safety and at a leisurely unhurried pace.

54().

A.for 

B.along 

C.in 

D.from
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单项选择题

一个PNP型的三极管，它的发射极电压与基极电压和集电极电压相比较它的发射极电位应（）。

A.最高

B.最低

C.居中

D.为0
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