The residents, _______ had been damaged by the earthquake, were given help by the Red Cross.

I remember the time _____ Eric won that speech competition.
A where         B why       C when      D which

The following are some popular websites________people can sell goods to each other.

_____ wants to go rafting this weekend, raise your hands, please.

With the fast development of agriculture, the people, ______ village she taught ten years ago, have lived a happy life.

There are several research centers in China ________ a certain disease called Bird Flu is 
being studied. 

The Spring Festival Gala（春晚）of 2013         theme was Happy Chinese New Year attracted a large audience

Everyone has a stage in their life ______ they seem to have trouble in everything.

In my opinion, everyone has periods in their lives _______ everything seems very hard.

The farm________ we learned to feed cattle two years ago has changed a lot.