单项选择题

Since the new technology was introduced last month, we（）in speeding up production.

A. succeed
B. succeeded
C. have succeeded
D. will succeed

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单项选择题
Perhaps the day will come（）our city will be without any pollution.

A.when
B.while
C.as
D.what
单项选择题
Where will the man transfer his flight（）

A. Tokyo.
B. New York.
C. Beijing.
D. Hong Kong.
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