单项选择题
A.leaf B.leafs C.leaves
I usually go to the office（）train.A.withB.byC.on
单项选择题I usually go to the office（）train.
A.with B.by C.on
A:（）are your parents? B: They are in China.A.WhatB.How...
单项选择题A:（）are your parents? B: They are in China.
A.What B.How old C.Where
Look at Tom! What（）?A.does he doB.is he doingC.he is do...
单项选择题Look at Tom! What（）?
A.does he do B.is he doing C.he is doing
