she could swim in the river when she was 6years old改为同义句

she could swim in the river when she was 6years old改为同义句

while she was 6 years old,she could swim in the river

she must 6 years old to swim in the river

"后面少了一个空，应该是：she could swim in the river _____ _____ ____ _____six years old. she could swim in the river when she was 6years old.改为同义句：she could swim in the river (at the age of) six years old."    谢谢采纳！