【单选题】
1. If they ______ to do this work, he might do it some other way.
【单选题】
8. I______ go to bed until I ______ finished my work last night.
【单选题】
15.Man _____ die without air or water.
【单选题】
16.Let’sclean our classroom, ______?
【单选题】
7. If it is fine tomorrow, we ______ a football match.
【单选题】
19. _______hand in his exercise book before Monday.
【单选题】
9. No sooner _______ he arrived home than he _______to start on another journey.
【单选题】
13. Where is my pen? I ______ it.
【单选题】
14. I didn’thear the phone. I ______ asleep.
【单选题】
10. He _______ accomplish the task on time.