Shanghai Expo has been building an Expo Village for the participants, but other choices will also be if the Expo Village does not satisfy their needs．
A. accessible
B. available
C. affordable
D. approvable
网友回答
A. accessible
(答案→)B. available
C. affordable
D. approvable
解析：词义辨析。 A．易接近的B．有效地；可利用的 C．负担得起的
D．可核准的。句意：上海世博会已经为参与者建立起了世博村，但是如果世博村不是满足他们的需要，其它选择也是可取的。结合语境可知选B为最佳答案。