British people say "please" and "thank you" all the time some people in Asia may think it unnecessar...
2022-11-21 20:03:45 54次 2016届江苏省太仓市九年级5月教学质量调研测试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
British people say "please" and "thank you" all the time some people in Asia may think it unnecessary.
A. while B. because
C. unless D. since
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