People tend to live more happily and longer if they are ________ about life. 

At the end of the year 2010, some species of birds ddn’t survive the _____ winter in some European countries.

The instructor asked us to list anything in our past that we felt ______ of，regretted and read our lists aloud.

“Oh, how fat he is!” “But I think he is ____ than fat.”

The only drawback of the voyage was the ______ sea, which made me very seasick.