The city, _______ by an army of 1,500 soldiers, was difficult to take.
| A．protected | B．defended | C．attacked | D．prevented |
If you hurry up, I think it quite ____for you to catch the flight, for there are still 50 minutes left.
| A．probably | B．likely |
| C．possibly | D．certainly |
Nowadays people are convinced ___ the negative effect of second-hand smoking ___ people around.
| A．of; at | B．by; in |
| C．of; on | D．on; at |
—Would you rather ______ there to attend the lecture tomorrow?
—No, I’d rather he ______ there instead of me.
| A．to go; will go | B．go; went |
| C．go; will go | D．going; shall go |
It is hard for us to eat better, exercise more, and sleep enough, ________ we know we should.
| A．since | B．even if |
| C．unless | D．as if |
At the conference, they came up with three different _____ to solving the serious problem.
| A．approaches | B．means |
| C．methods | D．ways |