— Tom seems not so enthusiastic as he was two years ago.
— Yes. He’s really reached a point in his career ______ he has to decide what to do next.
| A．that | B．when | C．where | D．which |
— Thank you for your CD - ROM. I'll return it as soon as I can. — ________. I've got another one to spare.
| A．No problem | B．No hurry | C．With pleasure | D．Nothing much |
Apples are usually sold by ________ weight and eggs are sometimes sold by ________ dozen.
| A．the; the | B．/;a | C．/; the | D．the; a |
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 |
.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 |
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 |