Mum isn't in .She has _to Hangzhou on businessa,gone b,been并说明理由但老师说选b

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Mum isn't in .She has _to Hangzhou on businessa,gone b,been并说明理由但老师说选b
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Mum isn't in .She has _to Hangzhou on businessa,gone b,been并说明理由但老师说选b
Mum isn't in .She has _to Hangzhou on business
a,gone b,been并说明理由
但老师说选b

Mum isn't in .She has _to Hangzhou on businessa,gone b,been并说明理由但老师说选b
Mum isn't in .She has to Hangzhou on business
has gone to 表示去了某地,现在还没回来
has been to 表示去过某地,现在也已经回来了
(尽量用简洁的语言表述给你,)

a

A. gone 指妈妈现在不在这里,去了杭州(尚未回来)。
B. has been to表示曾经去过杭州,现在已经回来。
故选A。
俗话说:人非圣贤,孰能无过?老师也会错啊。

选a,因为gone表示去了been表示去过,在这个句子中,用去了比较通顺,用去过就不符合语言习惯了。

选a.
他们解释的很明白了。