The bridges over the Fuyang River have been rebuilt, _________ it possible for boats to sail.
| A．to make | B．making | C．being made | D．to be made |
—Sorry, I got a bad cold yesterday.
—Every time you are absent, you ________ an excuse.
| A．take up | B．give up |
| C．send up | D．make up |
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 |
It is no good always complaining about life. ________ ，we are living.
| A．At least | B．Or else |
| C．What's more | D．Instead |
By the time he was twelve, Edison __________ to make a living by himself.
| A．would begin | B．has begun |
| C．had begun | D．was begun |
As its name indicates, the “American Host Family” program gets American families __________in foreign students' lives in America and offers homes for them.
| A．to involve | B．involving |
| C．involved | D．having involved |