his father has been to America twice 对twice 提问

his father has been to America twice 对twice 提问
是真的,如果是上面那样,
英语人气:754 ℃时间:2019-08-26 06:31:49
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回答:How many times has his father been to America?
twice 是两次的意思 对次数提问要用How many times
应该不会吧,至少也有been吧!
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