灭火器内充的灭火剂过一定时间后会减少，当压力降低到一定程度时，需及时更换、填装。( )
参考答案：对
— Jim can play _______ soccer very well. What about you?
— I can play _______ piano very well. [ ]
A. /; the
B. /; /
C. the; /
