-You look so worried, what’s wrong? -More and more people like me begin to worry about the ______ pollution after the haze (雾霾) appeared in Beijing and some other cities in China.
The clever boy said to ___________, “ I’ll do ___________ best to work out the problem.”
Shanghai lies ___________ the east of China and ___________ the northeast of Guangdong.
Daniel is very modest. He never ___________ before his friends.
I don't like bread. I won't eat it ______ I am very hungry.
The bus is coming. Oh, no! It's full. I'm afraid we can't ______.