( )she able to ride when she was 3 years old?

问题描述:

( )she able to ride when she was 3 years old?
A.Can B.Could C.Is D.Was

选择D 因为 she was 3 years old是过去式 所以填is的过去式was
be able to是固定词组
意:她能在她3岁时骑自行车吗?