【正文】
racticed playing tennis 6 a day, in the morning and in the afternoon. (Section B 2a— 2e) Through① this kind of hard training, she improved 7 lot. But sometime later, she felt pain in her knee. Her knee couldn’t bear so much. 8 she had a strong body② , her coach said that she couldn’t spend so much time on tennis, or her knee would give out. At last she changed her 9 . (Section B 2a— 2e) So, although③ you love to do 10 very much, you should also know how much you can do, or it will be bad for your body. (