问题
About ________ of the teachers in our school were born in ______________.
A:two thirds； 1960s
B:second three； the 1960s
C:two third； the 1960s
D:two thirds； the 1960s;
B:second three； the 1960s
C:two third； the 1960s
D:two thirds； the 1960s;
正确答案是：
