问题描述：
Can I see you headmaster at the moment,please?
I'm afraid not.He( ) to the USA.He ( ) back 2 days later.
A .flew ,will come B.has flown ,will come
如果选A
给我个理由
I'm afraid not.He( ) to the USA.He ( ) back 2 days later.
A .flew ,will come B.has flown ,will come
如果选A
给我个理由
问题解答：
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