–Areyousureyouhaveto?It’sbeenverylate.--Idon’tknow
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问题详情:
– Are you sure you have to? It’s been very late.
-- I don’t know ______ I can do it if not now.
A. where B. why C. when D. how
【回答】
C
知识点:连词
题型:选择题
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