Many areas were stricken by the typhoon,and it was quite difficult to ______ the exact losses.

Smoking is a bad habit．You should it．

Steven, what do you think of Mark—Well, he is always trying to________his wisdom in front of others.

Kate had a terrible time this summer. Not a day ________ without having some unpleasantness with her sister at home.

I don’t know if it ____ tomorrow. If it _____, we will go out for a picnic.