wasdoing和isdoing有什么区别?A:Icalledyouat9o‘clockthismorning,butyoudidn’tanswerit.B:Oh,Iameetingatthattime1、had2、have3、amhaving4、washaving选哪个?

Question

was doing和is doing有什么区别?
A:I called you at 9 o‘clock this morning,but you didn’t answer it.
B:Oh,I___a meeting at that time
1、had 2、have 3、am having 4、was having
选哪个?

Answer 1

was doing 和is doing 的区别是：
前者是过去进行时,后者是现在进行时
你这个题目用was having ,因为
上文是说以前的事情
你回答,是我当时正在开会
也是说的以前在开会,不是现在在开会