Some people have t------ falling to sleep.if you don't sleep well,you don't feel very well in the daytime.Here is some advice on how to i----- your sleep .Not all of these tips w-------- for everyone,
网友回答
trouble
improve
work======以下答案可供参考======
供参考答案1:
不知道。供参考答案2:
第二空是improve
（改进）其他想不出来
供参考答案3:
trouble
improve
work