吃的是油，穿的是绸，还有钱来搞旅游。普通中国人的生活发生这样的变化是在[ ]
A．解放后
B． * * 结束后
C．改革开放后
D．加入WTO 后
答案：C
Hi！Amy, you didn’t come to my party last night, I just wonder ______last night.
A. Where are you B. where you are
C. where were you D where you were
“挑战杯”大学生课外学术科技作品竞赛参赛时间为每逢双数年几月至下一年几月（）
A.6月-6月
B.9月-9月
C.10月-10月
D.12月-12月
