单项选择题
A．It is small and cheap. B．It has a larger vocabulary. C．It has 40% more examples. D．It is designed for students and teachers.
A．expand Hartley Lifecare Co. Ltd. B．support service for the disabled C．create more fun for customers D．develop local economy
A．这种新型空调功率很高，公司电费一年高达四万美元。 B．这种新型空调高效节能，一年能为公司节省四万美元。 C．这种新型空调效率很高，公司一年节省了电费四万美元。 D．这种新型空调效率很高，公司一年仅需支付电费四万美元。