he started swimming when he was four years old,同义句he started swimming ( ) ( )

问题描述:

he started swimming when he was four years old,同义句
he started swimming ( ) ( )

he started swimming (years ) (ago ).
希望可以帮到你~

He began to swim when he was four years old.

如果只有两空,则答案为:at four
如果是四空,则答案是:at the age of four
即:at four = at the age of four 在四岁的时候
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he started swimming aged four.