ABILITY

我小时候能跑得很快。

When I was young, I ___could run very fast.

我五岁的时候就能自己系鞋带了。

When I was five, I ___could tie my shoes by myself.

我小时候能一口气游过整条河。

When I was little, I ___could swim across the whole river in one go.

我小时候能背下整本童话书。

When I was little, I ___could memorize an entire fairy tale book.

我能听出那是一个男人的声音，但我没能识别出来。

I ___could ___tell it was the voice of a man, but I failed to identify it.