1. The English word typhoon comes from the Chinese word big wind.

2. All the students are encouriaged to vote in the forthcoming elections.
   

Tree ring dating, also known as dendrochronology, can be used to determine the age of treesreconstruct past climate, by cutting down the trees, counting the rings and studying thesequence and width of the rings. 

Communication has changed significantly in the last 10 years. Discuss the positive and negativeimpacts of this change. 

1. When the workers ask for the increase of wages, the company raises its prices. 

2. This morning's lecture on economic policy has been cancelled.