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How do you guess ________?
A.did they finish the work within so short a time
B.they finished the work within so short a time
C.had they finished the work within so short a time
D.will they finish the work within so short a time
B

试题分析:考查名词性从句。本题考查了名词性从句的语序问题,在所有的名词性从句中都要使用陈述语序。本题的ACD三项都使用疑问语序,故都可以排除。故B正确。
点评:在所有的名词性从句中都需要使用陈述语序,不能使用疑问语序。
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