为什么要信仰马克思主义?
A. 马克思主义是科学理论,创造性地揭示了人类社会发展规律
B. 马克思主义是人民的理论,第一次创立了人民实现自身解放的思想体系
C. 马克思主义是实践的理论,指引着人民改造世界的行动
D. 马克思主义是不断发展的开放的理论,始终站在时代前沿
I ________your last point. Could you say it again?
A. didn't quite catch
B. don't quite catch
C. hadn't quite catch
D. can't quite catch
Does Liu Hui serve in the army? -No,but he_______in the army for three years.
A. served
B. has served
C. is serving
D. would serve
-Will you go to the park now?-Not until I _________my physics exercises.
A. will finish
B. have finished
C. will have finished
D. had finished