题目内容

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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