问题
选择题
My mother _____ on business for three days. She'll return in a week. [ ]
A. left
B. has left
C. has gone
D. has been away
答案
答案：D
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My mother _____ on business for three days. She'll return in a week. [ ]
A. left
B. has left
C. has gone
D. has been away
答案：D