22. It is no use _____to come now. He is busy.
A. ask him B. to ask him C. that you ask him D. asking him
21. Charles Babbage is generally considered ______ the first computer.
A. to invent B. inventing C. to have invented D. having invented
20. I was too excited ______ .
A. speak B. to speak C. not to speak D. speaking
19. "I usually go there by train." "Why not ______ by boat for a change?"
A. to try going B. trying to go C. to try and go D. try going
18. "What do you think of the book?" "Oh. excellent, it's worth _______ a second time."
A. to read B. to be read C. reading D. being read
17. People couldn't help ______ the foolish girl.
A. laugh at B. to laugh at C. laughing at D. laughing :
16. Excuse me for _____ in without ______.
A. coming, asking B. coming, being asked C. to come, asking D. to come, being asked
15. Most of the students enjoy_____ stamps.
A. collect B. to collect C. collecting D. collected
14. We are looking forward to ______ another chance ______ it again.
A. be given, to try B. give, to try .C. giving, trying D. having, to try
13. You can keep the book until you ______ .
A. have finished reading B. finish to read
C. will finish reading D. have finished to read
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