问题补充:
--- “What will you do during the summer holiday?”
--- “I don’t know, but it’s high time something.”
A. I’m deciding
B. I’ll decide
C. I decided
D. I decide
答案:
A. I’m deciding
B. I’ll decide
(答案→)C. I decided
D. I decide
解析:it’s high time that是做…的关键时候了。
从句中要用虚拟语气,从句可用一般过去时,也可用should + do,此时should不可省略。故选C