1. Class is over,we play volleyball.
    下课了,我们打排球.

2. Certainly middle-class audiences did; the working-class audiences were more likely to clap for a character who revolted against authority,
    中产阶级当然这样认为；劳动阶级倒更有可能为这样一个反抗权势的角色拍手喝彩：

3. Unfortunately, the professor appeared and the class began.
    令人遗憾的是这时教授进来了，开始上课了。

4. Our class is not very big.
    我们班不算很大，

5. On Saturday afternoon we usually have our class meeting.
    星期六下午通常是开班会，

6. One more thing: the day after tomorrow our class team will have a basketball match with Class Three.
    还有一件事:我们班后天同三班举行篮球比赛，

7. One group performed balance exercises on a computer-controlled platform once a week, one group took a weekly tai chi class, and a control group met for a weekly discussion.
    一组每周在电脑控制的平台上进行一次平衡练习，一组每周上一次太极课，而另一受控组则每周进行一次讨论。

8. One eats only organically produced vegetables and believes all living things are holy, even ants and mosquitoes, while the other likes wearing fur and enjoys cutting up frogs in biology class.
    一个只吃天然蔬菜产品，认为所有生物都是神圣的，即使是蚂蚁、蚊子也如此，而另一为却爱穿皮草，喜欢在生物课上将青蛙开膛破肚。

9. The class of fliers which harness the air to their purpose, but must yield to its opposition.
    它能自如地驾驭空气，但必须顺气流飞行。

10. I know you´re eloquent,but this is not a debate class.
    我知道你是善辩的, 但这不是讨论课.