题目

听下面一段独白，回答以下小题。 （1） Why will the speaker's uncle open the restaurants? A . To make profits. B . To feed the needy. C . To spread his recipes. （2） How will the speaker's uncle get the ingredients? A . By collecting unwanted things. B . By buying fresh vegetables. C . By getting cheap stuff at the market. （3） How can people receive food at the restaurant? A . Help themselves. B . Reserve in advance. C . Wait at tables. （4） What's the speaker's attitude towards his uncle's action? A . Supportive. B . Shock小俞对着山崖大喊一声，经过2s听到回声，那么小俞与山崖之间的距离大约是    m（空气中声速取340m/s）．这种方法    （选填“能”或“不能”）用来测量地月之间的距离．