1. Our offer( ) and remains good until 12:00 a.m. July 12, 2008, Beijing Time. A. are firm offers B. are firm offer C. is firm offer D. is a firm offer ...

6. Not until the game had begun ___ at the sports ground. A. had he arrived B. would he have arrived C. did he arrive D. should he have arrived ...

8. Our offer( ) and remains good until 12:00 a.m. July 12, 2008, Beijing Time. A. are firm offers B. are firm offer C. is firm offer D. is a firm offer ...

14. The letter of credit is until December 16th. A. favourable B. invalid C. valid D. unfavourable ...

17. It was not until she had finished all her work _____. A. when she went home B. that did she go home C. and she went home D. that she went home ...

4. Don’t come___ I call you. A. since B. until C. If D. unless ...

14. We must ___ until help arrives. A. hang about B. hang back C. hang over D. hang out ...

19. He _____walking until fell over. A. arranged B. attempted C. attacked D. attracted ...

21. It was not until the train had left _____ the station． A. I arrived B. did I get to C. that I arrived D. that I reached ...

27. His mother stood waving until the train was out of（ ）. A. sight B. glimpse C. scene D. reach ...