题干

I ______ in Tibet for three years; if you go there for your holiday this summer, I’ll have my friends take care of you.
A.worked B.had worked
C.workD.was working
上一题 下一题 0.64难度 单项选择 更新时间:2015-03-12 09:11:00

答案(点此获取答案解析)