问题补充:
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; aD. a;the;/
答案:
前面a waste of time/money…”为固定短语;中间为on the Internet,表示特指; 后面为for pleasure=for fun,为固定短语。