Nowadays children have easy access to computers so most of them spend lots of time playi

问题补充：

Nowadays children have easy access to computers, so most of them spend lots of time playing computer games after class.

A. an; the

B. /; the

C. an; /

D. /; /

答案：

A. an; the

B. /; the

C. an; /

(答案→)D. /; /

解析：考查冠词：第一空不填，have easy access to很容易获得，第二空也不填after class下课后，句意：现在，孩子很容易接近电脑，所以很多学生下课后花很多时间玩电脑。选D。