问题
选择题
Three of the town’s factories have closed down _____ the space of a year.
A．among
B．after
C．beyond
D．within
答案
答案：D
题目分析：考查介词：A. among在（三者以上）之间，B. after 在…后面，C. beyond超出，D. within在…之内，句意：在一年之内这个镇上有三个工厂都关闭了。选D。
