单项选择题Why does the author say that nothing was wasted before the invention of fridges
问答题Direction:For this part,you have to write a short passage on the topic:Volunteer Teaching in the West.You should write at least 150 words following the outline given below in Chinese: 1.每年,高校许多大学生受到鼓舞去贫困地区支教; 2.支教活动的意义; 3.你的看法。
单项选择题(32)()
A.packed B.concerned C.marked D.lined
单项选择题The third paragraph is developed ______.
单项选择题What were the people asked to do in the study()
A. To make a face at each other. B. To get their faces impressive. C. To classify some face pictures. D. To observe the researchers’ faces.