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y C. playing D. played17. I’m considering ___ his letter.A. to answer B. how answering C. to be answering D. how to answer18. Tell us _____ next. A. how to do B. what to do C. how do D. what do19. We want to know ___ to help him when he is in trouble.A. what will do B. what we should do C. how to do D. what will we do 20. Don’t stop trying. You’ll be sure ___ .A. succeed B . succeeding C. of succeeding D. to succeed21. The government calls on us ____ our production.A. increased B. increasing C. increase D. to increase22. With his teacher ____ he wanted to try it a second time.A. helping B. to help C. help D. helped23. The lady was watched ____ her room in silence.A. had left B. left C. leave D. to leave 24. I’m hungry . Get me something ____.A. eating B. to eat C. to be eaten D. eaten25. His wish ,____ a doctor ,came true. A. ing B. e C. to e D. came26. He loves praise. He is always the first ____ and the last _____.A. of ing 。 of leaving B. es。 leaves C. to e。 to leave D. ing。 leaving27. At last they found a house _____ . A. to leave his things with B. to leave his things in C. leaving his things in 28. There is nothing ______ . A. to worry B. to worry about C. worry D. worry about you got enough room ___all of us ?A. seating B. to seat C. seated D. to be seated30. It is too dark for us ____ anything in the room. A. see B. seeing C. to see D. seen31. The young man is ____ willing ____ the old living around here.A. very。 helping B.