--Why do you get up so early in the morning?---I make it a to get up before 7am to read E

问题补充：

--Why do you get up so early in the morning?

---I make it a to get up before 7am to read English.

A. plan

B. wish

C. secret

D. rule

答案：

A. plan

B. wish

C. secret

(答案→)D. rule

解析：plan计划；wish愿望；secret秘密；rule规则。句意：上午你为什么起这么早？——我把每天早晨七点前起来读英语当成一条规则。结合语境可知选D。