Tom learnt to swim at the age of seven.(对划线部分提问(at the of seven) _ _ Tom _ to swim?

问题描述:

Tom learnt to swim at the age of seven.(对划线部分提问(at the of seven) _ _ Tom _ to swim?

小汤姆从5岁起就学法语。 began 开始 age of 5:5岁起 小TOM在他5岁时开始学法语。

When did Tom learn to swim?