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20. Roses need special care ______ they can live through winter. ( 04 全國 I) (B) A because B so that C even if D as 21. ______ you call me to say you’re not ing, I’ll see you at the theatre. ( 04 全國 II) (D) A Though B Whether C Until D Unless 22. Several weeks had gone by______ I realized the painting was missing. ( 04 全國 IV) ( B) A as B before C since D when 23. The house could fall down soon if no one______ some quick repair work. ( 04 全國 IV) ( C) A has done B is doing C does D had done 24. _______ I can see, there is only one possible way to keep away from the danger. ( 04 北京春季)( B) A. As long as B. As far as C. Just as D. Even if 25. _________, I have to put it away and focus my attention on study this week. ( 04 上海春季)( C) A. However the story is amusing B. No matter amusing the story is C. However amusing the story is D. No matter how the story is amusing 26. A fast food restaurant is the place _____, just as the name suggests, eating is performed quickly. ( 04 上海春季)( B) A. which B. where C. there D. what 27. I’d like to arrive 20 minutes early _________ I can have time for a cup of tea. (05 北京卷 ) (D) A. as soon as B. as a result C. in case D. so that 28. It was some time ______ we realized the trut