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3. Read and match. 读一读，连一连。
答案
解析
根据描述匹配图片。第一句“This is the Great Wall. It's very long.”对应长城图片；第二句“This is Tian'anmen Square. It's very big. It's near the Palace Museum.”对应天安门广场图片；第三句“This is the Palace Museum. It's very old.”对应故宫图片。
4. Read and write. 读一读，完成句子。
I live in
I can
This is the flag of
I live in
China
.I can
speak
Chinese.This is the flag of
China
.答案
China; speak; China
解析
第一空：根据“Beijing is the capital city of...”及单元主题“China”，可知居住在“China”。第二空：“说某种语言”用“speak”，主语“We”后接动词原形“speak”。第三空：北京是中国的首都，填“China”。
