文学活动是由（）、作者、作品和读者构成的一个螺旋式的循环结构。
A.物质
B.世界
C.意识
D.人文
参考答案：B
My grandma _____in the country. Now she _____in the city. [ ]
A. used to live;lives
B. used to living;lived
C. uses to live;is living
D. was used to live;lives
