单项选择题

You have to work（）faster.

A.a lot
B.a great much
C.a great deal
D.a good much

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单项选择题

Which of the following measures do police take to make use of the Internet to solve crimes？（）

A.They use the search engines to find clues about cases.
B.They supervise the suspects’online activities.
C.They try to make friends with the suspects on the Internet.
D.They use the Internet to release emergency notice.

单项选择题

Supply of petroleum is subject to dramatic ups and downs （）.

A.in the long run
B.in the long roads
C.in the long rounds
D.in the short run