John once worked in a remote mountain village school, which is only on foot.
A. accessible
B. acceptable
C. available
D. appropriate
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(答案→)A. accessible
B. acceptable
C. available
D. appropriate
解析:词义辨析。Accessible可进入的,可达到的;acceptable 可接受的;available 可利用的,可得到的;appropriate适当的,恰当的。句意:John曾经在一个偏远的山村小学工作,那里只能步行达到。所以选A。