Tim Cook called his mother every week even while he_______ around the world.

Lanmon _________ here for almost ten yearsand he has many Chinese friends.

Jack, I haven’t seen your uncle for a long time.—He ___ Tibet as a volunteer because of the earthquake.

_________ boys are there in our class

Nanjing isn’t as large _____ Shanghai, but it’s the second _____ city in East China.