The rivers will become dirtier and dirtier________ we take action to protect them.
June 1st is Day. All the children enjoy it very much.A Children B Childrens’ C Children’s D Child
----How long has Sam been skating?------He for five hours.A have been skating B has been skating C was skating D has been skated
There is in today’s newspaper.A something important B important something C anything important D important anything
Eight students in our school are from countryside.A hundreds B hundred C hundreds of D hundred of
Some parents might worry that their children's hobbies can _______ schoolwork.