Both sides exchanged their views on a wide ______ of topics they were interested in at the meeting. ( 章节：1 难度：3)_做题室

单项选择题Both sides exchanged their views on a wide ______ of topics they were interested in at the meeting. ( 章节：1 难度：3): A、extent; B、expand; C、number; D、range

正确答案：D
答案解析：
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