从下列词组中选择适合的词组完成句子 keep to keep up with keep on keep off keep out of keep up 1. _________ the grass! 2. If this rain __________, the garden will be ruined. 3. Try to ________ trouble. 4. Don’t run — I can’t ________you. 5. He just _________writing, paying no attention to the cry of the baby. 6. He always ________his promises.