Harry Potter has _____sold more than 30million books 这里为什么不能用been

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Harry Potter has _____sold more than 30million books 这里为什么不能用been
Harry Potter has _____sold more than 30million books 这里为什么不能用been

Harry Potter has _____sold more than 30million books 这里为什么不能用been
been sold和sold都是可以的.
sell 有一个用法:用主动表示被动,
如 The book of this kind sells well .

sell这个词主动可表被动,在这里has sold = has been sold