—Good morning. I want to buy two ____.   —OK. Here you are.

Girls are afraid of math .They think they have some         learning it .

Could you give me some         on how to learn English well?

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

________ speak_________ in ________.