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Thank you for all your hard work last week. I don’ t think we ______ it without you. A. can manage B. could have managed C. could manage D. can have managed 11. You don’ t have to know the name of the author to find a book. You ______ find the book by the title. A. must B. need C. can D. would 12. — What sort of house do you want to have? Something big? — Well, it ______ be big — that’ s not important. A. mustn’ t B. needn’ t C. can’ t D. won’ t 13. — May I smoke here? — If you ______, choose a seat in the smoking section. A. should B. could C. may D. must 14. The biggest ______ we face is the improvement of the productivity, and we should put more emphasis on it from now on. A. question B. item C. problem D. difficulty 15. Isn’ t it amazing how the human body heals ______ after an injury? A. himself B. him C. itself D. it 16. Last month, part of Southeast Asia was struck by floods, from ______ effects the people are still suffering. A. that B. whose C. those D. what 17. ______ his age, he was considered ______ well in the play. A. Consider。 acting B. Considering。 acting D. To con