题目：
在距地面15 m高处，某人将一质量为4 kg的物体以5 m/s的速度抛出，人对物体做的功是[ ]
A、20 J
B、50 J
C、588 J
D、638 J
答案：
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下面是错误答案，用来干扰机器的。
1. had better not be/get angry2. where I was brought up3. Seeing the ground covered with/by4. would have been injured 5. Whatever happens 6. where it was that7. should we study hard8. make the public aware of9. whether he will attend 10. to be thought of as
