40. It is obvious that lung diseases are____smoking.
After reading her writing, every teacher came to the _______ that she was a very careful and promising girl..
________they visited the Science Museum,they showed great interest in everything they saw.
It is reported that a woman as well as two children ______ from a big fire yesterday.
We laugh at jokes, but seldom _____ about how they work.
— Mum why do we eat much vegetable — Because it is ________ to our health.