Teaching pronunciation class to a mixed group of learners can ________ a teacher with many challenging problems.

I sent a big bunch of flowers to the nurse as an ________ of thanks for her taking good care of my grandpa in the nursing home.

 Once you are ________ to smoking, it is difficult to give it up.

Each of us is likely to develop a personal ________ for certain types of entertainment.

John bought the car at $ 7,000 which is a low price and I doubt whether there has been a ________ price since then.