选择短语完成句子。 use up, turn up, stay up, pick up , cheer up , put up 1. I can't hear the radio clearly. Please _____ it _____ . 2. You look so tired, don't _____ _____ to night. You should go to bed now. 3. Tom is unhappy now. Let's _____ him _____ . 4. We should give it to teachers if we _____ _____ something in the street.