At the meeting, ______ problems of ______ unemployed were discus

At the meeting, ______ problems of ______ unemployed were discussed in detail.
A、/, an
B、the, the
C、/, /
D、the, /
【正确答案】：B
【题目解析】：the problems特指所有的问题。the + adj. 表示某一类人，the unemployed表示失业的人，故选B。