【题目】写出以下动词的过去式过去分词。（10分）
【1】keep
【2】rise
【3】grow
【4】make
【5】feel
【6】become
【7】do
【8】sell
【9】sing
【10】sleep
在线课程【答案】
【1】keep kept kept
【2】 rise rose risen
【3】grow grew grown
【4】 make made made
【5】 feel felt felt
【6】become became become
【7】do did done
【8】sell sold sold
【9】sing sang sung
【10】sleep slept slept
【解析】略