Has the teacher finished marking the exam papers SORRY,I DON'T KNOW.He _______(mark) themHas the teacher finished marking the exam papers SORRY,I DON'T KNOW.He _______(mark) them in the office yesterday afternoon.为什么用was marking 而不是marked
问题描述：
Has the teacher finished marking the exam papers SORRY,I DON'T KNOW.He _______(mark) them
Has the teacher finished marking the exam papers
SORRY,I DON'T KNOW.He _______(mark) them in the office yesterday afternoon.
为什么用was marking 而不是marked
答