用适当的关系代词填空That’s all___ I knowThis is the first thing ____I

用适当的关系代词填空
That's all___ I know
This is the first thing ____I bought in the shop
The boy.____hand is injured,is crying on the road
I can't find the two boxes ,the covers of _____ are red
This is one of the most interseing movies___ I've ever watched

1.what
2.that
3.whose
4.those
5.that

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