My friend Tom stays at Internet bars above 8 hours every day , really a netter(网虫).A. on a

My friend Tom stays at Internet bars above 8 hours every day , really a netter(网虫).
A. on average
B. in charge
C. up close
D. for free

(答案→)A. on averageB. in chargeC. up closeD. for free解析：“我的朋友Tom平均每天在网吧待8个小时，真是一个网虫。”A. on average 平均 B. in charge 掌管 C. up close 很接近 D. for free免费，答案A。

这下我知道了