31．The fact that smoking is harmful to health is____most smokers are quite aware of

The noise of the traffic makes my head________.How I wish I were not on the road.[ ]

Do you mean that we have lost our way—_____, my dear. We’d better ask someone for help.

My mother always gets a bit _________ if we don’t arrive when we say we will.

My younger sister is always _________but she also likes listening to others quietly.