The furniture is ____ of wood.

Mary is tired of learning because she is_____ to do better than she can, both at school and at home. 

Food safety is important. Rules _____ to stop people from food pollution.

If you come to Hangzhou, you shouldn’t miss the show Impression West Lake! It is created by the famous director Zhang Yimou, and the actors’ performance __________on the water of the West Lake.

The young trees should______ as often as possible.