Either you or I _____ going to attend the meeting in the afternoon.

I help you, sir—I appreciate ________ if you do me the favor topack the luggage.

Would youplease__________the paper for me and see if there are any obvious(明显的) mistakes—Of course I will.

Heating the news that my father was ill，I was so worried that I couldn’ton anything．

You don’t forget when we borrowed that reference book, do you?— I can’t remember now but ________ sometime last week?