20．More and more people in Shanghai choose to go to work underground．( )A．inB．withC．byD．fo——青夏教育精英家教网—

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科目： 来源： 题型：选择题

20．More and more people in Shanghai choose to go to work__________ underground．（　　）

A．

B．

with

C．

D．

for

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科目： 来源： 题型：选择题

19．We have friends to help us fight against pollution，and trees are one of ________．（　　）

A．

themselves

B．

they

C．

their

D．

them

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科目： 来源： 题型：填空题

18．3D打印能帮助制造某些人类器官，它已经不像刚问世时那么神秘了．
3-D printing can help make some human organs．It isn't asmysterious as it firstappeared to be．

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科目： 来源： 题型：填空题

17．今年地球日的主题是"绿色城市"．一个绿色的城市是由能节约能源和减少浪费的设施
构成的．
The theme of the Earth Day this year is Green City．A green cityismadeof facilities that can save energy and reduce waste．

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科目： 来源： 题型：选择题

16．Which of the following is the best place to enjoy Jinan Festival of Springs from August 23^rd to September 6^th？（　　）