单选题：Techniques to harness the energy of the sun are being devel

题目内容：

Techniques to harness the energy of the sun are being developed. A．convert
B．store
C．utilize
D．receive

参考答案：

答案解析：

The river widens considerably as it begins to turn east.

The river widens considerably as it begins to turn east.A．extends B．stretche C．b

分类：综合类题型：单选题

The energy companies launched urgent studies of the Arctic environment.A．made B

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The government warned the people of being careful about this kind of contagious

分类：综合类题型：单选题

That uniform makes the guards look absurd.A．serious B．beautiful C．impressive D．r

分类：综合类题型：单选题

We were attracted by the lure of quick money.A．amount B．supply C．sum D．temp

分类：综合类题型：单选题