—What’s the trouble?
—They said I should not be allowed ____ here．They don’t allow ____ in the hospital.
| A．smoking, to smoke | B．to smoke, smoke |
| C．to smoke, smoking | D．smoking, to smoke |
—My grandfather _______coffee, but now he _______ tea．
— That’s good．You know tea is good for our health.
| A．used to drinking, drinks |
| B．used to drink, is used to drinking |
| C．is used to drinking, used to drink |
| D．is used to drink, is drinking |
—What are you _____? — I’m afraid I can’t pass the test.
| A．worry | B．worry about |
| C．worried | D．worried about |
China _______ a lot in the last few years．Now it has become one of the strongest _______ in the world.
| A．changes, countries | B．changed, country |
| C．has changed, countries | D．had changed, countries |
—There’s a big test on Tuesday．I really need some help．Can you tell me ______?
—Sure!
| A．how do you study for a test |
| B．when do you study for a test |
| C．how to study for a test |
| D．when to study for a test |