Last month, the Japanese government expressedtheir thanks for the aid they ______ from China.

下列各句中，没有语病、句意明确的一项是（ ）

You look so worried, what’s wrong—More and more people like me become to worry aboutthe __________ pollution after the haze (雾霾)appeared in Beijing and some other cities in China.

The shoes made in Chengdu are usually of high quality, so they _____ long.

ins, Who their homework, were allowed to play badminton on the playground.