单项选择题

Some of the students have already learned enough English to()a conversation with a native English speaker.

A. carry on
B. keep on
C. go on
D. hold on

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单项选择题
The unemployment rate in this city () from 7% to 6% in the past two years.

A. has fallen
B. had fallen
C. is falling
D. was falling
单项选择题
China has a population of 1.3 billion, () it the largest country in the world by population.

A. making
B. made
C. makes
D. to make
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