【正文】
suddenly, so it is difficult to warn people about them. 地震總是發(fā)生得很突然,所以很難給予人們預警。 句中的 them指的是 earthquakes。 當堂檢測 單項選擇: ( ) 1. It’s too dangerous. You must _________ the fire. A. keep away from B. lift up C. look after D. prepare for ( ) 2. You should keep clear ______ the machine. A. with B. Of C. out D. at ( ) 3. I am leaving now. ______ you turn off the lights and the puters. A. To make sure B. Make sure C. Made sure D. Making sure ( ) 4. You _____ be late for school again next time. A. mustn’t B. needn’t C. don’t have to D. don’t need to ( ) 5. Must I do my homework at once? No, you _______. A. needn’t B. mustn’t C. can’t D. may not ( ) 6. You ____ ask that man over there. Maybe he knows the way. A. had better not to B. had not better C. had better D. had better not ( ) 7. You are very tired. Why _______ have a rest? A. not you B. do not you C. not to D. not you 課后反思 : 課后訓練 完成 100至 103頁 的作業(yè)。