【题目】Tourism has already in South Africa, a country thousands of miles away From West Africa of Ebola, which killed about 4,000 people．
A．increasedB．directed
C．declinedD．boomed
在线课程【答案】C
【解析】
试题解析：increase增加；direct导演；decline下降；boom激增。分析句意并结合个选项的意思，可知应选C。
句意：在南非的旅游业已经下降了。它就离西非那个致使大约4000多人死亡的埃博拉病毒几千英里远的地方。