1 . Half of the population uses some kind of dietary supplement, and the number is on the ________ .
A.rise | B.way | C.line | D.air |
您最近半年使用:0次
2 . Open the windows and _____ the room. Let’s breath fresh air.
A.air | B.to clear |
C.to air | D.clearing |
您最近半年使用:0次