单项选择题

A cartel is (an association) of producers in a (given) industry (whose) purpose is (restrict) competition.（）

A. an association
B. given
C. whose
D. restrict

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单项选择题

(After) the (development) (of) the steam engine by James Watt in the late 1700s, the Industrial Revolution progressed (forward) rapidly.（）

A. After
B. development
C. of
D. forward

单项选择题

Good research involves (more) merely (gathering) information; (it) is (essentially) a thinking activity.（）

A. more
B. gathering
C. it
D. essentially

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