问题
选择题
When _____ you have a school trip? Sorry, I _____ know. [ ]
A. are, don't
B. do, aren't
C. are, aren't
D. do, don't
答案
答案：D
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When _____ you have a school trip? Sorry, I _____ know. [ ]
A. are, don't
B. do, aren't
C. are, aren't
D. do, don't
答案：D