第6题: [单项选择]A fire is considered "under control" when (). A. all hands are at their fire stations B. all fire-fighting equipment is at the scene C. the fixed systems are activated D. the fire is contained and no longer spreading 参考答案:D
第28题: [单项选择]No sooner had they got the goods covered up ______ it started raining hard. A. when B. than C. then D. after 参考答案:B 答案解析:[解析] no sooner... than... :一……就……;hardly... when... :一……就……;scarcely... when... :一……就……。例如:No sooner