问题
选择题
I want to know how much _____ about the table manners around the world. [ ]
A. do they know
B. they know
C. did they know
D. have they knows
答案
答案：B
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I want to know how much _____ about the table manners around the world. [ ]
A. do they know
B. they know
C. did they know
D. have they knows
答案：B