任务型阅读。

    Clocks and watches help us get to the place on time. They can make our life easy. Have a quick look at a watch or a clock, and We can know the time. If we have little time, we must be quick. If we have much

time, we can take our time. We know the time, so we can do everything in time. But what about the blind people? They can't sec clocks or watches. Of course they don't know what time it is! What a hard life they are having! That's why someone makes a"talking watch" for blind people. The watch can tell them the right time. There is a button on the watch. When you touch the button, a voice "tells" the time. When it is dark at night, everyone can find the talking watch useful. The talking watch helps people a lot.

根据短文内容完成下列各题。

1. If we have no clocks or watches, we ____ get to school on time every day.

2. If we don't know the time, our life will be            .

3.          people can't see anything.

4.  If someone can't see anything, he can know the right time by using a        watch.

5. People who can see will______ the talking watch useful at night.

按国际标准化组织所制定的标准，20英尺的集装箱和40英尺集装箱的总重量分别为（）。

A.20320；40640

B.1524；30480

C.20320；30480

D.2000；4000