He began to learn Chinese(when he was 5 years old)对括号部分提问__ __ he_英语解答

He began to learn Chinese(when he was 5 years old)对括号部分提问__ __ he__ to learn Chinese?

人气：161 ℃　时间：2019-10-29 10:51:28

解答

When did begin为什么用when提问因为括号部分指的是时间(以when开头)，对时间提问就用when。