Unit3 Inventors and inventions单项选择题1.【原创】I sleep with the window open unless it`s really cold.A if B whether C unless D how【解析】我总是开着窗户睡觉, 除非天气非常冷才关上窗户.unless=if not 除非.【答案】C【教材原句】The criteria are so strict that it is difficult to get new ideas accepted unless they are truly novel.2. 【原创】The ice is thick enough to your weight.A bear B beard C beat D beer【解析】..