单项选择题

Do you want to fly first or______ class

A．savings
B．thrifty
C．economy
D．economics
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单项选择题
The club has______ a new rule allowing women to join.
A．brought forth
B．associated with
C．turned over
D．laid down
单项选择题
Students______ business administration must take at least one course in statistics.
A．participating in
B．joining in
C．choosing to
D．majoring in
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