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1. 句号 Period [.] 用以表示一个句子的结束： Hockey is a popular sport in Canada. The federal government is based in Ottawa. 用在缩写中： B.C. is the province located on the West Coast. Dr. Bethune was a Canadian who worked in China. The company is located at 888 Bay St. in Toronto. It is 4:00 p.m. in Halifax right now. 2. 问号 Question Mark [?] 在句子的结尾使用问号表示是直接疑问句：How many provinces are there in Canada? 注意：在间接疑问句结尾不要加问号： The teacher asked the class a question. Do not ask me why. 3. 叹号 Exclamation Mark [!] 在句子的结尾使用叹号表示惊讶、兴奋等情绪： We won the Stanley Cup! The forest is on fire! 4. 逗号 Comma 句子中的停顿：Therefore, we should write a letter to the prime minister. 在疑问句中引出说话人：I can come today, she said, but not tomorrow. 排列三个或以上的名词：Ontario, Quebec, and B.C. are the three biggest provinces. | 
