The managers discussed the plan that they would like to see _______ the next year.
| A．carry out | B．carrying out | C．carried out | D．to carry out |
—The experiment is of particular importance.
—I see. We will carry on with it ________ we can get enough money.
| A．unless | B．though | C．whether | D．until |
When people move to another country, they often try ________ the customs of their native land.
| A．to keep on | B．to keep off | C．to keep up | D．keeping up |
Although punctual himself, the professor was quite used ________ late for his lecture.
| A．to have students | B．for students’ being |
| C．for students to be | D．to students’ being |
Apples are usually sold by ________ weight and eggs are sometimes sold by ________ dozen.
| A．the; the | B．/;a | C．/; the | D．the; a |
______ professional violinsit practises for several hours a day, but ______ violinist has his own way of playing the Beethoven concert.
| A．Each；every | B．Every；each | C．All；every | D．Either；every |