You should let your children play ______you can see them

下列各组句子中加横线词活用现象不同的一项是（ ）

Amazing! You _____ have won the first prize in thenational English speech contest!I’m lucky that all my efforts have finally paidoff

ll the toys for the childrencarried to their kindergarten—-No,____ only some of them

I will have an important test tomorrow. I feelstressed now.—__________ and believe youself. You will pass it.