（ ） When I got to the airport,the lady told me that there wer on _____ left on that plane.
（ ） When I got to the airport,the lady told me that there were on _____ left on that plane.A.places b.seats c.space d.room 如果是座位为什么不能选A,同理为什么不可选C,另希望能详细讲解下本题,很不理解.