______和______有助于传达友谊和感情，但应注意尊重对方的风俗习惯和语言习惯，也要适合自己的身份。
参考答案：敬语 谦语
--- Never before in China ______ for the farmers.
--- You’re telling me. They extremely content with the new farming policies.
A. had so much been done C. so much has been done
C. has so much been done D. has done so much
在任何时刻，Access2003可以同时打开（）个数据库。
A.1
B.2
C.3
D.多个
