【题目】— 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 decide D. I decided
在线课程【答案】D
【解析】“it is high/about time （that） sb. should do sth./sb. did sth.”表示是某人该做某事的时候了。从句用should+动词原型或一般过去时，should不能省略。