同学捡到了一件校服,问是不是你的,他会说:________A.Is this your skirt? B.This is your uniform. C.Is this your uniform?
We shouldn't ____________ litter on the ground. A. throws B. throw C. threw
What can we do to make ____________ mother earth more beautiful? A. us B. we C. our
We can plant more ____________. A. trees and grass B. tree and grass C. tree and grasses
I like to go ____on Sundays. A. fishing B. to fish C.fish
I get up ___7:oo___the morning. A. at at B. at in C.in in