Would you mind _______ the window ? –No, not at all .Do please .[

Do you go home_______ bus or_______ foot?[ ]

Look, what’s that over there, under the tree?—It’s _________e-dog. It is my cousin’s.

Good news! The price of all those second-hand goods is ______ before.

We can have_______ bluer sky if we create________ less polluted world．