by a greater demand of vegetables, farmers have built more green houses.
| A．Driven | B．Being driven | C．To drive | D．Having driven |
________ for the free tickets, I would not have gone to the films so often.
| A．If it is not | B．Were it not | C．Had it not been | D．If they were not |
The Governor demanded that all the proposals _______ on May 1st.
| A．must be submitted | B．be submitted | C．submitted | D．were submitted |
—Do you know what _____ influenza A (H1N1) has?
—A high temperature, throat pain and so on.
| A．signals | B．roots | C．symptoms | D．treatments |
—I really thought I would be offered the chance.
—Oh, well, , Jack.
| A．you’re right | B．best wishes | C．better luck next time | D．congratulations |
.---Have you any letters ______, sir? I’m free this time.
---No, but thank you all the same.
| A．to type | B．to be typed | C．to be typing | D．typed |