衍生工具包括（）。
A.即期
B.远期
C.掉期
D.期货
参考答案：B, C, D
解析：业务操作规范-外汇业务核算操作规程-第七章-第一节
下列每句话中都有一处错误，请找出并改正。
1. September 10th is Teacher's Day.
A B C D
2. They are going to buy a bicycle at Sunday.
3. The little boy work hard at school.
4. How old is your friend? He's twelve year old.
5. Rose has supper and her family.
