单项选择题

They are trying to identify what is wrong with the present system.（）

A．prove
B．consider
C．discover
D．imagine

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单项选择题
The new service helped boost pre-tax profits by 10%.（）

A．prove
B．consider
C．increase
D．double
单项选择题
Take some spare clothes in case you get wet.（）

A．extra
B．fine
C．winter
D．outdoor
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