问题补充：
It’s seven in the morning. It’s time .
A. go to school
B. going to school
C. to go to school
D. goes to school
答案：
A. go to school
B. going to school
(答案→)C. to go to school
D. goes to school
解析：本题考查的是It‘s time for sb to do sth，其中for sb 可以省略，在it is time to do sth，后接动词不定式，故选答案为C
