题目内容

His parents died when he was three, so he had a(n) (happy)childhood.

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Not all students (true) know what they are going to learn when they take a course.

I felt quite (confuse)when I was first at college. I didn’t know what courses to take.

球反弹到接近和达到最高点的阶段是（）。

A. 高点期
B. 上升前期
C. 上升后期
D. 下降期

乒乓球正规比赛场地为（）。

A. 长10米，宽6米，高5米
B. 长12米，宽5米，高6米
C. 长14米，宽7米，高5米
D. 长16米，宽8米，高6米