I.根据句意及其首字母提示补全单词。(5分) 1.The p of India is about 1.1 billion . 2.If you don’t obey the rules in our class , you’ll be p . 3.In developing countries, many people can’t afford their children’s e______. 4.There are some d between British English and American English. 5. Trees can p sand from moving towards the rich land. II.用所给单词的适当形式填空(5分) 6.The students stopped ________________ (laugh) when the teacher came in. 7.The classroom ought to________