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必修⑤ Unit 3 Ⅰ.单词拼写 1．His speech made a good ________ (印象) on the audience. 答案：impression 2．Lightning ________ (闪光) in the sky. 答案：flashed 3．I need an ________ (立即的) reply. 答案：instant 4．Zhang Haidi is ________ (乐观) about her life. 答案：optimistic 5．He ________ (经常) calls me，which makes me angry. 答案：constantly 6．It's necessary for everyone to ________ (系牢) your safety belt when driving. 答案：fasten 7．If you ________ (按) the button，the machine will start. 答案：press 8．The ________ (周围的) scenery in our school is very beautiful. 答案：surrounding 9．They have ________(相似的)experiences，but their end result is different. 答案：similar 10．If you want to get the job，you'd better have ________(以前的) experience. 答案：previous Ⅱ.完成句子 1．I ________ ________ ________ him in the crowd. 在人群中我再也看不到他了。 答案：lost sight of | 
