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》这块冰厚得足以支撑你的重量。bear支撑 <重量、物体>; beard胡须；beat击败；beer啤酒。
