Smoking is one of the ______ of heart di

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问题选择题

Smoking is one of the ______ of heart disease and it kills lots of people every year.

A．causes

B．reasons

C．excuses

D．results

答案

答案：A

词义辨析。A. 引起的原因 B. 理由；理性 C.接口；理由 D. 导致的结果。句意：吸烟是引起心脏病的原因之一，每年致死很多人。结合语境可知选A。

填空题

用括号内所给单词的适当形式填空

1. Tom was __________(surprise) at the news of Wen Chuan earthquake in China.

2. We know many animals are in __________(dangerous) today.

3. His __________(cousin) mother is a women doctor.

4. __________(kill) the animals is against the law.

5. How many __________(orange) are there in the basket?

单项选择题

重型四面刨床一般是指有七、八根刀轴，加工工件宽度为（）以上的四面刨床。

A.100mm

B.200mm

C.300mm

D.400mm