单选题Dozens of scientific groups all over the world have been _____ the goal of a practical and economic way to use sunlight to split water molecules.A pursuingB chasingC reachingD winning

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单选题

Dozens of scientific groups all over the world have been _____ the goal of a practical and economic way to use sunlight to split water molecules.

pursuing

chasing

reaching

winning

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相似问题和答案

第1题：

47) In Europe, as elsewhere, multi-media groups have been increasingly successful: groups which bring together television, radio newspapers, magazines and publishing houses that work in relation to one another.

正确答案：
多媒体集团在欧洲就像在其他地方一样越来越成功了。这些集团把相互关系密切的电视台、电台、报纸、杂志、出版社整合到了一起。

第2题：

All the machines ______by the end of this month.

A. would have been repaired

B. were repaired

C. will have been repaired

D. were being repaired

正确答案：C
[解析] 由by the end of this month可知，本题考查将来完成时。

第3题：

Over the past century, all kinds of unfairness and discrimination have been () or made illegal. But one insidious form. continues to thrive: alphabetism.

A、charged

B、accused

C、criticized

D、condemned

参考答案：D

第4题：

She gave all her properties to a charity organization which _______ her great respect from people all over the world.

A、earned

B、saved

C、developed

D、led

正确答案:A

第5题：

世界各地每天都在发生这样的事情。(all over the world)

正确答案：Happen every day in all over the world.

第6题：

The author mentions big cities such as Tokyo, Singapore and Paris______.

A. to show that city people all over the world have a lot in common

B. to let his readers be aware that they are some of the world's biggest cities

C. to illustrate their difference from American cities

D. because they are some of the cities that attract visitors most

正确答案：A

44．答案为A 从第三段第一句可知国际上的大城市有很多共同之处。A正确。

第7题：

Experiments of this kind ____ in both the U.S. and Europe well before the World War.

A have conducted

B have been conducted

C had conducted

D had been conducted

参考答案：D

第8题：

The marvels there()lots of tourists from all over the world.

A、attract

B、appeal

参考答案：A

第9题：

________ can be done ________ been done.

A.All that...has

B.All that...have

C.All...has

D.All...have

正确答案：A
解析：本题考查主谓一致的用法。由 all that 引导的主语从句“all that can be done”(所有能被做的事情)应视为单数，所以整个句子的谓语动词也应该用单数形式，构成现在完成时的被动语态：has been done。句意：“所有能做的都做了。”

第10题：

Chinese all over the world () the Spring Festival.

A、reserve

B、preserve

C、conserve

D、observe

参考答案：D

Dozens of scientific groups all over the world have been ___

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