早教吧 育儿知识 作业答案 考试题库 百科 知识分享

Onlywhenhehadfinishedhishomeworkabletogotosleep.a.hewasb.washec.hedidd.didhe为什么选B不选D

题目详情
Only when he had finished his homework__able to go to sleep.
a.he was b.was he c.he did d.did he
为什么选B不选D
▼优质解答
答案和解析
be able to do something 是固定搭配,e.g.he was able to finish his job,不能用did able