— do you play computer games?—Every night. A. How longB. WhenC. How muchD. How often

问题补充：

— do you play computer games?

—Every night.

A. How long

B. When

C. How much

D. How often

答案：

A. How long

B. When

C. How much

(答案→)D. How often

解析：句意：你多久玩一次电脑游戏？每天晚上都玩。how long 就一段时间提问；when表示“什么时间，何时”，how much表示“多少”，用来修饰不可数名词；how often就频率提问；根据后面的回答可知本句是询问的玩电脑游戏的频率；故选D。