I called you yesterday afternoon...--- I called you yesterday afternoon ,but nobody answereed the phone.--- Oh,I (explain)the words to my students.Oh,I _________ (explain)the words to my students不好意思，本来有空，但提交之后就没有了啊。是用 explain 填空。
问题描述：
I called you yesterday afternoon...
--- I called you yesterday afternoon ,but nobody answereed the phone.
--- Oh,I (explain)the words to my students.
Oh,I _________ (explain)the words to my students
不好意思，本来有空，但提交之后就没有了啊。
是用 explain 填空。
答
What?
答
have explained
答
was explaining