单选题   At the meeting both sides exchanged their views on a wide ______ of topics they were interested in.
 
【正确答案】 D
【答案解析】本题为词义辨析题。extent常指“程度”，用于to some extent短语中；range常指“范围，系列，一定的区域等”；collection常指“收藏品，搜集品”。本句大意为：在会议上双方就他们感兴趣的议题广泛交换了意见。