Shanghai is the city ______ the 2010 world Expo is held. –So it is a city____ most of us want to vist this summer.

What ____________ you _____________ last weekend?—I wrote some letters and read a book.

_______ of us has some bad habits. We must get rid of them.

I think she is ________at dancing than singing.

_ may have a chance to be successful if he tries his best.