1.Friendship is like money: easier made than _______.
A.kept B.to be kept C.keeping D.being kept
2. _______ the meeting himself gave them a great deal of encouragement.
A.The president will attend B.The president to attend
C.The president attended D.The president's attending
3.Unless _______ to speak, you should remain silent at the conference.
A.invited B.inviting
C.being invited D.having invited
4. She will tell us why she feels so strongly that each of us has a role _______ in making the earth a better place to live.
A.to have played B.to play
C.to be played D.to be playing
5.Having a trip abroad is certainly good for the old couple, but it remains _______ whether they will enjoy it.
A.to see B.to be seen
C.seeing D.seen
6.The research is so designed that once _______ nothing can be done to change it.
A.begins B.having begun
C.beginning D.begun
7. — How do you deal with the disagreement between the company and the customers
— The key _______ the problem is to meet the demand _______ by the customers.
A.to solving; making B.to solving; made
C.to solve; making D.to solve; made
8.In order to gain a bigger share in the international market, many state-run companies are striving _______ their products more competitive.
A.to make B.making
C.to have made D.having made
9.Quite a few people used to believe that disaster _______ if a mirror was broken.
A.was sure of striking B.was sure of having stuck
C.was sure to be struck D.was sure to strike
10. Though _______ money, his parents managed to send him to university.
A.lacked B.lacking of
C.lacking D.lacked in
11. Don't use words, expressions, or phrases _______ only to people with specific knowledge.
A.being known B.having been known
C.to be known D.known
12. _______ to sunlight for too much time will do harm to one's skin.
A.Exposed B.Having exposed
C.Being exposed D.After being exposed
13. Prices of daily goods _______ through a computer can be lower than store prices.
A.are bought B.bought
C.been bought D.buying
14.In some parts of London, missing a bus means for another hour.
A.waiting B.to wait
C.wait D.to be waiting
15.When , the museum will be open to the public next year.
A.completed B.completing
C.being completed D.to be completed
16.In order to make our city green, .
A.it is necessary to have planted more trees
B.many more trees need to plant
C.our city needs more trees
D.we must plant more trees
17. With a lot of difficult problems , the newly-elected president is having a hard time.
A.settled B.settling
C.to settle D.being settled
18. _______ such heavy pollution already, it may now be too late to clean up the river.
A.Having suffered B.Suffering
C.To suffer D.Suffered
19. 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
20.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
21. 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
22.The bell _______ the end of the period rang, _______ our heated discussion.
A.indicating;interrupting B.indicated;interrupting
C.indicating;interrupted D.indicated;interrupted
23.Fishing is his favorite hobby, and _______.
A.he'd like to collect coins as well
B.he feels like collecting coins, too
C.to collect coins is also his hobby
D.collecting coins also gives him great pleasure
24._______ late in the afternoon, Bob turned off the alarm.
A.To sleep B.Sleeping
C.Sleep D.Having sleep
25.One learns a language by making mistakes and _______ them.
A.correct B.correcting
C.corrects D.to correct