21. The lady said she would buy a gift for her daughter with the ____________ .

A. 20 dollars remained B. 20 dollars to remain

C. remained 20 dollars D. remaining 20 dollars

22. When I got back home I saw a message pinned to the door ， ________ “Sorry to miss you ; will call later .”

A. read B. reads C. to read D. reading

23. The purpose of new technologies is to make life easier ， ___________ it more difficult .

A. not make B. not to make

C. not making D. do not make

24. Robert is said _________ abroad ， but I don’t know what country he studied in .

A. to have studied B. to study

C. to be studying D. to have been studying

25. __________ from heart trouble for years ， Professor White has to take some medicine with him wherever he goes .

A. Suffered B. Suffering C. Having suffered D. Being suffered

26. Finding her car stolen ， ___________ .

A. a policeman was asked to help B. the area was searching thoroughly

C. it was looked for everywhere D. she hurried to a policeman for help

27. Do let your mother know all the truth . She appears ___________ everything .

A. to tell B. to be told C. to be telling D. to have been told

28. I really appreciate _________ to relax with you on this nice island .

A. to have had time B. having time

C. to have time D. to having time

29. The missing boys were last seen __________ near the river .

A. playing B. to be playing C. play D. to play

30. The visiting Minister expressed his satisfaction with his talks ， __________ that he had enjoyed his stay here .

A. having added B. to add C. adding D. added

31. The first textbooks ________ for teaching English as a foreign language came out in the 16th century .

A. having written B. to be written

C. being written D. written

32. European football is played in 80 countries ， __________ it the most popular sport in the world .

A. making B. makes C. made D. to make

33. The Olympic Games ， _________ in 776 B. C. ， did not include women players until 1912 .

A. first played B. to be first played

C. first playing D. to be first playing

34. I would love _________ to the party last night but I had to work extra hours to finish a report .

A. to go B. having gone

C. going D. to have gone

35. ___________ in thought ， he almost ran into the car in front of him .

A. Losing B. Having lost C. Lost D. To lose

36. The patient was warned __________ oily food after the operation .

A. to eat not B. eating not C. not to eat D. not eating

37. The boy wanted to ride his bicycle in the street ， but his mother told him __________ .

A. not to B. not to do C. not to it D. do not to

38. How about the two of us ________ a walk down the garden ?

A. to take B. take C. taking D. to be taking

39. The computer center ， __________ last year ， is very popular among the students in this school .

A. open B. opening C. having opened D. opened

40. Charles Babbage is generally considered _________ the first computer .

A. to invent B. inventing

C. to have invented D. having invented