—Be careful not to drop the Tang Dynasty vase .
—Yes , we can’t be .
| A．too careful | B．very careful | C．too careless | D．careless enough |
31. I would rather buy a house in the countryside than in the city.
32.
| A．it | B．one | C．this | D．That |
29. —It’s hard to believe that Jack ________ have fought with the policeman.
—Yes. If one ________ ask for trouble, it can’t be helped.
| A．would; will | B．must; may | C．should; must | D．need; dare |
28. If our car had not ________, we would have been here on time.
| A．broken out | B．broken into | C．broken away | D．broken down |
27. This new kind of chemicals will help keep the air, soil and water________ from pollution.
| A．free | B．empty | C．loose | D．Short |
26. Barack Obama has taken personal blame ________ the security failures which led ________ the attempt to blow up a plane on Christmas Day.
| A．of; to | B．for; to | C．on; on | D．in; on |