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Can you help me with my lessons?-----I'm sorry,_____I have something improtant to do.A.yet B.but C.however D.for答案是B,

题目详情
Can you help me with my lessons?
-----I'm sorry,_____I have something improtant to do.
A.yet B.but C.however D.for
答案是B,
▼优质解答
答案和解析
选 B.but 但是
有轻微的转折的意思,这是常用的举行,BUT后面加原因,有点委婉.