（）是职业道德的出发点和归宿。
A.爱岗敬业
B.服务群众
C.奉献社会
D.办事公道
参考答案：C
I'm sorry that I can not accept your ________ to attend your birthday party, Linda, because I'm
________ to answer all the customers' letters tonight by my boss. [ ]
A. requirement; required
B. demand; requested
C. request; asked
D. request; required
-How much did you _____ all these things?
-More than forty dollars.[ ]
A. spend
B. cost
C. give
D. pay for
