It's important _ us to learn English well.
If it________ , I will go to the Central Park with my son this weekend.
---- Is that pen? ----- No, It is eraser.A. a; a B. a; an C. /;an
---What’s on the desk?— There are two .A. pencil B. dictionary C. rulers
If(如果) this is your backpack, please call Ann 32467589.A in B. at C. of
---Who is that boy? ---- He is my .A. father B. brother C. grandfather