After Billy proved that he could ride a bicycle safely,his father_英语解答

After Billy proved that he could ride a bicycle safely,his father ___ to him and bought him one.

人气：170 ℃　时间：2019-08-29 07:24:27

解答

当 Billy 证明他可以安全的骑自行车之后,他爸爸答应了他并且还买了一辆给他
应该填 promises
proved 是证明的意思