题目内容
Only in this way, directed by the teacher, ______work out the problem the day before.
A.had they | B.they could | C.could they | D.did they |
D
解析
|
题目内容
Only in this way, directed by the teacher, ______work out the problem the day before.
A.had they | B.they could | C.could they | D.did they |
D
解析
|