![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
1 Laura/feels / nervous / when / he / come / see / dentist
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2 We must take steps to preserve natural resources ; otherwise the planet will be in danger
=> Unless.......
=>.....................................................
2 We must take steps to preserve natural resources ; otherwise the planet will be in danger
=> Unless.......