We have a Computer lesson every Friday.A. inB. atC. onD. /

问题补充：

We have a Computer lesson every Friday.

A. in

B. at

C. on

D. /

答案：

A. in

B. at

C. on

(答案→)D. /

解析：考查介词的用法。句意“我们每周五有电脑课。”every“每一的”，every，this等前不加冠词。故选D。