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问题: SOS!!!高二英语~谢谢各位啦!!!

1.Out-of-door____1__a good habit of regular drinking and the avoidance of late eating ___2__are all helpful to sound sleep.(帮忙翻译一下哦,如果能分析一下结构就更好了~~)
1.A.walks B.exercises C.trips D.housework
2.A.worry B.fear C.carelessness D.hard work

2.It is seven years______he left here.(为什么不用完成时呢?)
A.that B.since C.when D.before(改成after可以吗?)

3.Is this factory______he once visited ?
A.that B.which C.the one D.where

(小生不才,麻烦每题都能解释一下,感激不尽的说~~)

解答:

第1题应该分别选A和D;第2题应该选B;第3题应该选C。楼上错的真离谱啊