-Is it high time that we on the school building?-- Yes it .A. do some repairs; is

问题补充：

---- Is it high time that we on the school building?

---- Yes, it .

A. do some repairs; is

B. do some repair; is

C. did some repairs; is

D. did some repair; was

答案：

A. do some repairs; is

B. do some repair; is

(答案→)C. did some repairs; is

D. did some repair; was

解析：在It is high time that…句型中，所跟的that引导的定语从句应该用虚拟语气，谓语动词应该用过去式，所以排除A、B选项。do some repairs和during repairs中常用repair的复数形式，但常说beyond repair, in good/bad repair, out of repair, under repair。