She will tell us why she feels so stronglythat each of us has a role _____ in making the earth a better place to live.

the ______, in your opinion, of helping him if he doesn’t make an effort to help himself

下列各句中，没有语病的一句是（ ）

They knew nothing about ______ he was athief

Mike has much difficulty ________ Chineseso he often asks me ________ help.