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nished in ,我們肯定不能及時完成任務(wù)。練習(xí):單項選擇1. You will be late ____ you don’t leave immediately. A. unless B. until C. if D. or2. ____ you keep icecream in a fridge, it melts. A. Unless B. Until C. If D. Or3. If you ____ a fish out of water, it ____ . A. will take/will die B. take/dies C. will take/dies D. took/dead4. If you _____ your timetable every night, you ____ which books to take. A. will check/will know B. check/know C. will check/know D. check/will know5. You ____ toothache if you ____ your teeth regularly. A. will have/clean B. will have/do not clean C. have/will clean D. will have/will not clean6. I ____ the police and plain about that noise unless it ____ soon. A. shall telephone/stops B. shall telephone/does not stop C. telephone/will stop D. telephone/will not stop7. If you ____ the tickets with you, we ____ to enter the cinema. A. do not take/will not allow B. take/will not allow C. do not take/will not be allowed D. take/will not be allowed8. If the fish ____ from the bird’s mouth, the bird will swallow it. A. won’t remove B. won’t be removed C. doesn’t remove D. isn’t removed9. If the rain doesn’t stop, you can enjoy ____ here for another day. A. stay B. to stay C. staying D. stayed10. Don’t put your umbrella over there, or you will forget ____ it home. A. take B.