The kid is not ______ to work out the problem, for it’s too difficult.

It’s really cold here. I have never experienced such terrible weather in my    life.

Paul attends very ________ meetings，and when he does，he has very ________ to say．

It is known that ________ medical examination helps people to find out health problems as early as possible.

The students were ________ over the ________ problem，listening to the teacher with a ________ expression on their faces.