问题
选择题
Mary made coffee _____ her guests were finishing their meal. [ ]
A. so that
B. although
C. while
D. as if
答案
答案：C
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Mary made coffee _____ her guests were finishing their meal. [ ]
A. so that
B. although
C. while
D. as if
答案：C
和事物的发展。这表明（ ）