—I _____ thank you enough for what you have done for me. —You’re welcome.

I didn’t go to the party, but I do wish I ____there.

—How did your mathematics exam go？—I thought I           ，but in fact I fell behind in the class.

---Mary knocked into a tree last night while driving, but she is all right.---She is lucky. She          herself badly.

There was a lot of fun at yesterday's party.You ________ come，but why didn't you?