Judging from _______ number of seats, ______ number of people were present at the meeting．
A.a; theB.the; aC.a; aD.the; the在线课程B
本题的含义是从座位的数量上来看，有许多人会出席会议，the number of表示……的数目，a number of表示很多的意思，故本题选B。