早教吧 育儿知识 作业答案 考试题库 百科 知识分享

TheSmithstheirbreakfastwhenthemorningpostcame.[]a.hadb.hasbeenhavingc.arehavingd.werehaving

题目详情
The Smiths _____ their breakfast when the morning post came.
[     ]
a. had
b. has been having
c. are having
d. were having
▼优质解答
答案和解析
d