党中央要求公安机关和人民警察在各项执法工作中，要把人民群众的呼声作为第一信号。( )
参考答案：对
It is ____ waste of time for young men to devote themselves to playing computer games on ___ Internet only for _____ pleasure.
A．/; the; /
B．the; the; /
C．a; the; a
D．a; the; /
