— I'm not sure. I ______ go to Beijing on business that day.
—He ________ put a lot of hard work into it.
—Oh, it's too bad. You________ have made full preparations.
—Yes, the whole thing has got intolerable, or they ________ have to be calling a meeting.
—You________ after finishing you work.
—Yes. But she have written the letter herself, because she doesn't even know one word.