Please tell me the after service of the computer; I’m worried about        a breakdown sometime．

I climbed the stairs slowly with a big suitcase, my father         with two more.

--Have you ever been to Beijing?---Yes, and I still remember ___ there when I was a little boy.

.How many of us ____ a meeting that has nothing to do with us is not important at all. 

The waiter greeted me with a big smile and _____ us by the window.