The two persons sitting on front seats in a car need to wear
A. no-slipping shoes
B. crash helmets
C. seat belts
D. glasses
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The writer compares humans to termites in order to prove that
A. both have the same function to a society
B. we are doing a collective job like termites
C. just as termites like to build a nest, so humans like to build a cathedral
D. an architectural wonder is always as elaborate as a termites' nest
What can you learn from the passage？
A. The soil and the deep sea belong to communities that haven't been fully explored.
B. It is surprising news wherever new species are discovered in the deep sea.
C. About 90 million species are believed to live in the deep sea.
D. A million species in the deep sea have been discovered and named.
买卖合同当事人可以在合同中约定标的物所有权转移的时间。()
A. 正确
B. 错误
Over the past two decades, teenage childbearing in the United States experienced a downward trend, and births to unmarried teens between 1970 and 1990______.
A. declined greatly
B. increased slightly
C. declined slightly
D. increased greatly
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