问题
选择题
Tibet is facing a(n)____task to maintain stability and all government workers must be on their highest guard.
A．concerned
B．subtle
C．ridiculous
D．urgent
答案
答案：D
题目分析：考查形容词。A. concerned关心的；B. subtle微妙的；C. ridiculous可笑的；D. urgent紧急的。句意：西藏正面临着一个维护稳定的任务，所有的政府人员必须高度警戒。故D正确。