The national treasure, the giant panda living mostly in Sichuan, is ________ to （独特） China.

Before getting through the Customs, you shall have your ____________（行李） checked.

Everyone was t___________ at the sudden shake of the house and started to run out.

With one leg injured and the other s_____________ him, he moved slowly home.

In modern society, it is very hard to a_________ one’s goal without cooperating with others.

Upon a________________ at home, Mum began preparing supper.

 It’s common sense that trees can a_______________ carbon dioxide and clean the air.

        When I was twelve years old, my family were the first black people to move into an all-white

It was not until _______ that I knew the truth.

A. you told me   B. did you tell me  C. had you told me   D. you have told me

As is well known, everyone is forbidden ________ in buses, regardless of what they are.

A. to smoke     B. smoking       C. to be smoking     D. to smoking