We spent many hours in a pleasant conversation______ how to fish.
The teacher is not easy-going,and he never ____in the pupils’ games.
Government officialsare______ people and they should____the people heart and soul.
With the development of socity,fewer and fewer old man is____ in the countryside.
I’m surprised to see that he has an_____look on his face.
Most plastic don’t readily ______ heat and electricity.