1．(2019·山东潍坊一中月考)My sister met him at the Grand Theatre yesterday afternoon, so he couldn’t have__attended(attend) your lecture.
2．—Jenny, I have washed the clothes for you.
—Thanks. You needn’t__have__done(not do) it. I could manage it myself.
3．—Did Mary come to the party?
—I don’t know. She may__have__come(come) while I was out.
4．There was a lot of fun at yesterday’s party. You should have come, but why didn’t you?
5．(2019·临川一中期末)What a pity! Considering his ability and experience, he could__have__done(do) better.
6．You needn’t__have__written(not write) such a long essay. The teacher only asked for 300 words, and you have written 600.
