I can’t believe that you got fined for speeding. I _________ of you as a careful driver.
| A．think | B．thought |
| C．have thought | D．am thinking |
The boss appeared ______ the accident and was not surprised at the news.
| A．to know | B．to have known | C．knowing | D．having known |
________ a vocation, and you’ll forget unhappy things
| A．Going on | B．To go on |
| C．Go on | D．If you go on |
---Why do you look so upset?
---There are so many troublesome problems _____.
| A．remaining to be settled | B．remained settled |
| C．remaining to settle | D．remained to be settled |
The cancer risks ___________ smoking have been well documented.
| A．involved with | B．involving with |
| C．associating with | D．associated with |
They are purely __________ weapons, not designed for attacks.
| A．offensive | B．defensive |
| C．offence | D．defensible |