---How well did John do in the match? --Wonderful. I think we can’t have a ______ player in our football team.

In the new curriculum, some courses are        , while others are optional for middle school students.

I often visit my parents, who live in the countryside whenever_______.

—Did you wash your new suit in hot water?—Of course not. I am not ______ foolish.

Though measures have now been taken to prevent further price hikes, many people remain _______ over the rising cost of food.