Who called just now, Sam—It’s Mona. She asked _____.

Shanghai is the city ______ the 2010 worldExpo is held.–So it is a city____ most of us want tovist this summer.

Everyone has such a busy life that sometimes it becomes tough to _____ with it.

The handicrafts, ________ had been made by the students, were sold out soon.

They can _______ the museum by bus.