单项选择题

Many a language () extinct over the centuries and some are near extinction.

A. have become
B. has become
C. had become
D. was become

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单项选择题
According to the passage, close social ties among people are ().

A. a must for social progress
B. beneficial for the family
C. a source of happiness
D. good for people’s health
单项选择题
How big is the Hope diamond now().

A. Over 100 carats.
B. 67 carats.
C. 60 carats.
D. 45 carats.
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