问题描述：
根据句意填空.Ann and Joan are( 1 ) .They look( 2 ) each other very much.
People often ( 3 ) that Ann is Joan or Joan is Ann, ( 4 ) it's to tell the difference.
上面一句的t's和to之间还有一个空，第二句以下为准。People often ( 3 ) that Ann is Joan or Joan is Ann, ( 4 ) it's ( 5 ) to tell the difference.
People often ( 3 ) that Ann is Joan or Joan is Ann, ( 4 ) it's to tell the difference.
上面一句的t's和to之间还有一个空，第二句以下为准。People often ( 3 ) that Ann is Joan or Joan is Ann, ( 4 ) it's ( 5 ) to tell the difference.
问题解答：
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