问题

The number of the students in our grade _______about______,andofthem are girls.
A:are, six hundreds,two- thirds
B:is, sixhundred, two- third
C:is, sixhundred, two thirds
D:are, sixhundreds, two third
B:is, sixhundred, two- third
C:is, sixhundred, two thirds
D:are, sixhundreds, two third
正确答案是: