CET-4 composition3. Key Words Composition关键词作文 Sample Test Item 指示：在30分钟内以“City and Countryside”为题，写一篇120 词左右的短文，必需包括下列关键词及表达方式，要求 使用正确、恰当。 Key words and Expressions: similarities differences environment transportation education entertainment colorful boring public health service reduce the gap
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