— There was a lot of fun at yesterday's party. You ________ come. Why didn't you?

— What a pity! But I had no time because I had lots of homework to do. [      ]

A. must have  

B. should

C. need have  

D. ought to have

在运动实践中，身体形态、身体机能的好坏，最终通过什么表现出来（）。

A.心理素质

B.运动素质

C.技术水平

D.战术能力