______percentage of the population died in Yushu Earthquake on April 14?
—Is it good to look up every new word when I come across it in reading?—No, you ________, because you are likely to guess the meaning from the context.
—Please don't tell anybody.—I ________. I promise.
To make the most of your time, live every moment as if it________ your last.
When my father is upset, he would rather ________.
What a pity! Considering his ability and experience, he ________ better.