问题
选择题
. The concert was a great success--there wasn’t a single empty seat in the concert hall, ____ it was very cold.
A．because
B．when
C．unless
D．although
答案
答案：D
本题的含义是这场音乐会很成功，虽然天气很寒冷，但在音乐会大厅没有一个空位，although表示虽然的意思，故本题选D。