类型不能成为立法的基础，因为立法的基础是抽象的概念。()
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原初事实不是单个的对生活事件的陈述，而是这些陈述的整合。()
What does the woman think is the biggest concern？
A. Petrol shortages.
B. Pollution problem.
C. Water shortages.
D. Global warming.
All of the following are some measures for environment protection EXCEPT
A. using public transport actively.
B. trying to use unleaded petrol.
C. using renewable energy actively.
D. trying to use natural gas.
It took him several years to______the shock of the death of his wife.
A. get over
B. get across
C. get off
D. get at
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