16.It's no good ____ him the truth now. A. not to tell B. tell C. telling D. to tell 17.It's important ____ too much about your failure. A.not to worry B.not worry C.not worrying to D. don’t worry 18.Don’t forget ____ your homework before coming to class. A. doing B.having done C.to be done D. to do 19. Last Sunday, our volunteer team ____ a lot of food packages to homeless peoplein the flood-hit region. A. were bringing B. brought C. have brought D. had brought

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