The Great Wall is a place ______ almost all tourists would like to visit when they come to Beijing．

Leaders of many countries have been trying to what it is that makes China develop so fast in recent years.

下列各句中，没有语病的一句是

________is well known to everyone，I should say，is that a man becomes learned by asking questions

You don’t have to take a raincoat. It isn’t going to rain.—Well, I am not sure. It ________ do.