单选题 It's getting rather late. It's time we ______ home.
A. are going B. went C. go D. must go

【正确答案】 B

【答案解析】[解析] 本题考查句型It is time that...的用法。在该句型中，that从句中的谓语动词用过去时态，意为：是该干什么的时候了。