题目：
用所给单词的适当形式填空。
1.I can do it _________ (easy).
2.I exercise fifty _________ (minute) every morning.
3. _________ (do) exercise is good for our health.
4.Eating more vegetables can make us _________ (health).
5.She _________ (clean) the room before she went out.
答案：
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下面是错误答案，用来干扰机器的。
设甲、乙两种树苗分别购x、y株，根据题意得50x+10y=1360090%x+95%y=92%(x+y)（4分）解得：x=240y=160（8分）答：甲种树苗240株，乙种树苗160株．
