– _______ that made Mrs. White so upset?
– Her son’s making trouble in the school.
| A．Where was it | B．Why was it | C．How was it | D．What was it |
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 |
24. My father didn’t have to say anything. I knew he was upset from his ________.
| A．look | B．sight | C．appearance | D．Sign |