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
网友回答
A. did they finish the work within so short a time
(答案→)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
解析：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。