He started _____to ride a bicycle when he was 3 years old.Ato learn Blearn CcleaningDlearns
问题描述:
He started _____to ride a bicycle when he was 3 years old.Ato learn Blearn CcleaningDlearns
答
答案:He started 【learning】to ride a bicycle when he was 3 years old.
解析;start doing sth.开始做某事.【已经开始做了.】
start to do sth.开始去做某事.【还没有开始做.】
从when he was 3 years old.可以知道已经开始做了.
【你的10满意,我们团队的无限动力】