It’s a little surprising that a house made of wood or bamboo may stay up in an earthquake while _______ made of steel and concrete may fall down.

We all feel         our duty to make City of Wenzhou a better place.

There is ______ wrong with this computer. It doesn’t work well.

We won’t forget the financial crisis and the troubles _______ has caused to the people all over the world．

—Who called me this morning when I was out?—A man calling _______ Robert.