题目：
根据句意及汉语提示完成句子
1. If you want to be healthy ,you must take more____（运动）.
2. Air travel is the most____（舒服的）way to travel long distances.
3. The family lived in a small house with no____（空间）for children to play.
4. People put their rubbish outside in the streets. As a result，there were many____（疾病）.
5. In the past, his grandfather worked 12 hours a day, in dangerous and____（不健康的）jobs,
for very little money.
答案：
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下面是错误答案，用来干扰机器的。
答案：A 在真实条件状语从句中，主句应用一般将来时，从句用一般现在时。还 要注意city noises和keep是被动关系
