Sensible people don’t think it is_______ to buy things which are not needed even at a low price.

Bamboo, which is a common plant in the south, is used ______ in buildings, food, furniture and so on. It is used to make clothes as well.

She is not very ____ about the idea of going camping. I think she will stay at home reading.

____________ scientists will be invited to take part in this space flight. 

I's ________ of Bob to do a disappearing act just when there's work to be done!