An increasing number of products made in China are good quality but much less expensive than those from abroad.
| A.on | B.in | C.for | D.of | 
 Apples are usually sold by ________ weight and eggs are sometimes sold by ________ dozen.
| A.the; the | B./;a | C./; the | D.the; a | 
 .---Will someone go and get Mr. Black?
 ---He’s already been ___.
| A.asked for | B.sent for | C.called for | D.looked for | 
 __ with such great difficulty, Jack felt at a loss ___.
| A.Facing; what to say | B.Faced; what to say | 
| C.Having faced; how to tell | D.Being faced; how to speak | 
—Sir, I’d like to take a week’s holiday.
  —____. We’ re too busy now.
| A.Forget it | B.Don’ t mention it | C.Don’t worry | D.Pardon me | 
—He looks very happy. He ____have passed the exam,
  —I guess so. It’s not difficult after all.
| A.should | B.could | C.must | D.might |