19、________ melamine（三聚氰胺）to milk makes the protein level appear higher, which brings a quick profit to some greedy companies.

A. Added                   B. Having added           C. Being added             D. Adding

18、Do we think we’re slow to adapt to change ________ we’re not smart enough to cope with a new challenge?

A. or                    B. and                          C. or that                    D. or but

17、Why don’t you call directory enquiries and ask them? It ________ a new number if it’s not in the book.

A. can be               B. could be                   C. must have been              D. must be

16、The new secretary works very well indeed, but surely not ________ Jennifer, the former secretary of the company.

A. so efficiently as                                             B. as efficient as

C. more efficient than                                         D. much efficiently than

15、Do you realize that I ________ some very important people to dine with me tonight? Your mistake could cost me an important contract.

A. invited               B. have invited              C. had invited                D. have been invited

14、 We are very impressed by your fluent English. I suppose your parents must speak very    good English as well.

Thank you. But ________ of them knows a single word of the language. I learned it all by myself.

A. either                          B. both                        C. neither                     D. none

13、Those who are potential customers will certainly be reassured to learn that a case covered in rubies and diamonds is included free ________ charge.

A. from                 B. to                     C. in                     D. of

12、在昨天的会议上，他没有提到他们是否将采取措施来解决空气污染问题。(mention, take measures)

二、选择题

（每空？ 分，共？ 分）

11、我们从不怀疑我们现在学习得越多，将来就能为国家工作得越好。(doubt, the more…, the more… )

10、电视和网络能使我们很好地了解世界各地正在发生的事情。(inform)