I am sorry to have kept you for a long time.
| A．wait | B．to wait |
| C．waiting | D．to wait |
–Excuse me, can I smoke here?
--No, ______.
| A．you must | B．you’d not better |
| C．you can | D．you’d better not |
May I have a rest? I have already finished ______ the report.
| A．write | B．writing | C．to write | D．written |
The story ______ I read the newspaper was about a common problem among teenagers.
| A．whose | B．who | C．that | D．where |
Yesterday evening, I _____ along the street when I suddenly met my maths teacher.
| A．walk | B．walked | C．was walking | D．am walking |
_____ they are very tired, they feel happy because they’ve finally finished their project.
| A．So | B．Although | C．If | D．But |