24．Excuse me, Madame. You still haven’t answered my question yet. Was it at 8 o’clock you

发布时间：2020-08-16 07:23:35


24．Excuse me, Madame. You still haven’t answered my question yet. Was it at 8 o’clock      
you heard Mr. Croft    at the door?
A. when; knocking
B. when; knock
C. that; knocking
D. that; knock

网友回答

(答案→)A. when; knocking
B. when; knock
C. that; knocking
D. that; knock
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