【题目】The public are________ about his claim that he has found a South China tiger，because they can't grow in such an area at all.
A.optimistic
B.favorable
C.skeptical
D.impressive

【答案】C
【解析】A. optimistic乐观的；B. favorable讨人喜欢的，良好的；C. skeptical怀疑的；D. impressive留下深刻印象的；句意：公众对他发现华南虎的声明持怀疑态度，因为华南虎根本不可能在这样的地方生长。根据句意，故选C。