My mother likes ____________. [ ]
A. dances
B. danced
C. dancing
答案：C
The reason _______ he was late was ________he hardly knew the way to the meeting place.
A．what; because
B．for which; that
C．that; because of
D．why; because of
起煤气净化作用的设备分别是（）。
A、预脱硫槽
B、转化炉
C、预热炉
D、中温脱硫槽
