问题
The number of people who _______ invited to the meeting _____ fifty, but a number of them _____ absent for different reasons.
A:were; was, was
B:was; was, were
C:were, was; were
D:were; were, was;
B:was; was, were
C:were, was; were
D:were; were, was;
正确答案是：
