----I’m going to the United States.
---- How long ____you ____in the States ？
| A．are; stayed | B．are; staying |
| C．have; stayed | D．did; stay |
Mike didn’t play football yesterday because he had_____ his leg.
| A．damaged | B．hurt | C．hit | D．struck |
I like getting up very early in summer. The morning air is so good _________.
| A．to be breathed | B．to breathe |
| C．breathing | D．being breathed |
Allen had to call a taxi because the box was _______ to carry all the way home.
| A．much too heavy | B．too much heavy |
| C．heavy too much | D．too heavy much |
A cook will be immediately fired if he is found _______ in the kitchen.
| A．smoke | B．smoking | C．to smoke | D．smoked |
One-third of the country____ covered with trees and the majority of the citizens______ black people.
| A．is ; are | B．is ; is | C．are ; are | D．are ; is |