1 When you are going mountain climbing , you should first check the weather forecast.

2 Many people say that da nang is one of the most beautiful cities in the Southeast Asia.

3 When you play basketball you have to throw the ball into the net.

4 When I and my brother were young, we went swimming every weekend.

1. When/ check/ mountain/ forecast/ should/ going/ weather/ you/ first/ are/ climbing,/ you/ the.

=>When you are going mountain climbing , you should first check the weather forecast.

2. Many/ beautiful/ Da Nang/ the/ of/ Southeast Asia/ say/ most/ in/ that/ one/ people/ cities/ is/ the.

=>Many people say that da nang is one of the most beautiful cities in the Southeast Asia.

3. You / basketball / into / throw / you / net / have / when / ball / play / the / to / the .

=>When you play basketball you have to throw the ball into the net.

4. When / small, / every / brother / swimming / were / we / my / I / weekend / went / and .

=>When I and my brother were young, we went swimming every weekend