—Are you in        ?— Yes, I am .

 —What’s your sister’s favorite_________?—Red.

-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. 

My classmate lent me a(an)    so that I wouldn’t get wet in the rain.

Please speak in a low       . The baby is sleeping.