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4．He was so lazy in the past that he fell behind his classmates. Now, he has been aware of the importance of study and always ________ ________ ________(专心/留意) the teachers in class, believing that he will catch up with them. 5．Nobody is certain about when the ancient customs ________ ________ ________(形成/产生)． 6．根据他浓重的口音，他肯定来自中国的北方。 ________ ________ his strong accent, he must come from the north of China. 7．中国有五十六个民族；各族人民和睦相处。 China contains 56 peoples, and all the Chinese people live ________ ________ and get along well with each other. 8．大熊猫是濒危动物。除非我们保护它不受到伤害，否则它就有灭绝的危险。 The giant panda is an endangered animal. It will be in the danger of ________ ________ unless we ________ ________ ________ ________ ________. 9．政府已大大地提高了市民的安全意识，结果交通事故在一定的程度上减少了。 The government has greatly raised the citizens' awareness of safety ________ ________ traffic accidents have decreased in a way. 10．“我终于通过驾驶考试了”。她如释重负地叹了一口气。 “I have succeeded in passing the driving test.” She sighed ________ ________. 答案：1.bursting into laughter/out laughing 2.succeeded in 3.To our relief 4.pays attention to 5.came into being 6.According to 7.in peace/in harmony 8.dying out; protect it from being harmed 9.so that 10.in relief 6．Daisy had always been longed to help the endangered species of wildlife.__________________ 7．Please listen to a story of the dodo and how it was disappeared from the earth.__________________ 8．My parents had to use all what they had to buy the house in which we are now living.__________________ 9．—The housework is too much for me, Jack. —Sorry, but I can't help doing it, Joan. I've got something important to do，you know.__________________ 10．Hearing the boring news, I was too distracted to concentrate my attention to my homework.__________________ | 
