问题补充：
We will learn English words this year, the teacher said to the students.
A. one thousand, three hundred and twenty-one
B. a thousand, and three hundred twenty-one
C. one thousand, three hundred twenty-one
D. a thousand, three hundred and twenty-one
答案：
(答案→)A. one thousand, three hundred and twenty-one
B. a thousand, and three hundred twenty-one
C. one thousand, three hundred twenty-one
D. a thousand, three hundred and twenty-one
解析：句意：“今年我们将学习一千三百二十个英语单词。”老师告诉学生们。数字的读数均为基数词，百和十之间用and 连接，故选A
