The reading club in our school welcomes those ________ of detective stories. 

Chinese farmers are mostly living a simple and _____ life as it is today.

A        friend is the one who you can trust and will not leave you alone when you are in need of help.

As to the subject, we have consulted the most _______ professor who gave us _______ explanation.

The knowledge that his friends have deserted him is a (n) ______ pill for Mr. Smith to swallow.