Since the matter was extremely _______, we had to turn to many people for help. ( 章节：1 难度：3)_做题室

单项选择题Since the matter was extremely _______, we had to turn to many people for help. ( 章节：1 难度：3): A、tough; B、tense; C、important; D、instant

正确答案：A
答案解析：
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