—What did you do yesterday?—My brother took two friends of ________ to play chess with us. But I don’t’ know _______ of them.

—Peter, what have done with the poor dog? He is wet through!—Not ______, mum! I never do the same thing a second time. 

Mary isn’t my sister. _________ is my cousin.

— My father has just bought          a new computer.— Really? How lucky are!

—How can I make full use of my time? —Make          a clear timetable first．