题目内容：

--- “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

优质解答

C.it’s high time 后面应用过去时的虚拟语气,与此类似的还有it's time ,I would rather ,I wish...