— The young man is good at a lot of things but you can’t say he is ________ .　　　　— I agree with you. Actually no one is.

 ______ with a difficult situation, Amold decided to ask his boss for advice.

Water can absorb and give off a lot of heat without big changes in temperature , thus creating a        environment .

As we all know, _________ exercise will help to strengthen the heart and improve circulation of the blood.

It’s an ________well (井). Stay away from it.