The League member is brave, honest and hard-working. In a word, he is a good boy of many ______.

Everybody believes he will be the winner of the100-meter ____

Why do you call him Mr．Knowledgeable— Because he knows almost everything we want to know．

I called you last night, but nobody answered— Oh, I usually _____ off my call phone by 8:00 p.m.

It’s dangerous to walk across the street carelessly.—You’re right. We can’t be ________ careful while crossing the street.