Spring Festival is the most important festival in China and an occasion ____ all family members get together, just like Christmas in the West.

Is this factory _____ your sister used to work?

The project is based on an agreement, one of ________ purposes is to ensure that the project can be accomplished before the deadline.

We are living in an age _____ many things are done on computer.

---- Where did you watch the national flag being raised last Monday morning?
---- It was on the square _____ we flew kites sometimes.      

The last thirty years _____ the greatest number of laws stopping our rights and progress. Until today we have reached a stage _____ we have almost no rights at all.

The air quality in the city, ________is shown in the report, has improved over the past two months.

Ellen was a painter of birds and of nature, _____, for some reason, had withdrawn from all human society.

We live in an age   more information is available with greater ease than ever before.

Sales director is a position         communication ability is just as important as sales.