作业帮He was able to____(ride)a bike when he was 8.
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He was able to____(ride)a bike when he was 8.
He was able to____(ride)a bike when he was 8.
He was able to____(ride)a bike when he was 8.
ride
be able to do 能够做……
所以填 ride 原形就行了
ride, 他八岁的时候就会骑自行车了
be able to do sth, 会/能做...