阅读并完成下列问题。

　　One day, two friends, Tom and Jack, were walking in a desert(沙漠)．Then Jack hit(打)Tom in the face．

　　Tom was hurt, but he didn’t say anything．Instead, he wrote in the sand(沙子)“Today my best friend hit me in the face．”

　　①on, found, walking, until, They, oasis(绿洲)，they ,an, went．They decided to get some water．Tom fell into the mire(泥潭)and was in danger, but ②his friend saved him．

　　When he felt all right, he wrote on a stone, “Today my best friend saved my life．”

　　Jack asked him, “After I hit you, you wrote in the sand and now you write it on a stone．Why?”

　　Tom answered, “When someone hurts us, we should write it down in the sand, then the wind can blow(吹)it away．But when someone does something good for us, we must write it on a stone where no wind can ever blow it away．”

1．Were Tom and Jack walking in an oasis(绿洲)？

________________________

2．Who saved Tom’s life when Tom fell into the mire(泥潭)？

________________________

3．将文中①处黑体部分连成一句：________．

4．将文中②处改写成被动语态形式：________．

5．根据短文内容回答下列问题，每空一词：What can we learn from this article?

When someone hurts us, we should f________ it; but when someone helps us, we must r________ it all the time．