The icebergs are dangerous because they are hidden __ and can turn over unexpectedly.

单项选择题A．1B．2C．3D．4

填空题executive

单项选择题A．It’s less expensive.B．It’s more comfortable.C．It’s faster.D．It’s more direct.

单项选择题A．He has a good sense of direction.B．He owns a smart car.C．He doesn’t know how to drive.D．He doesn’t know the way to the woman’s hous

单项选择题A．In the Pacific Ocean.B．Close to Europe.C．Nobody knows.D．In the Atlantic Ocean.

单项选择题A．Cooler weather.B．Raining.C．Warm and sunny.D．Stormy.

填空题business

单项选择题A．At a railway station.B．At a bus center.C．In the countryside.D．In a coastal town.

填空题This passage gives an introduction of ______.

单项选择题A．$ 5B．$ 15C．$ 30D．$ 250