单项选择题

Gas-fired power stations will（）for less efficient coal-fired equipment.

A. substitute
B. take place
C. represent
D. reproduce

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单项选择题
The club members（）in the meeting room at nine sharp.

A. assembled
B. collected
C. joined
D. amassed
单项选择题
The windows were open and all the papers on her desk were（）about the room.

A. located
B. disordered
C. scattered
D. replaced
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