第3题: [单项选择]According to Mr.Hunt,a trader needs to keep alert all the time because A. the financial position always changes quickly. B. the uncertainty will make the trader exhausted. C. the fast space of life can cause mental problems. 参考答案:A 答案解析:为什么Mr.Hunt说要时刻保持警惕Mr.Hunt说他其实很喜欢有一些不确定的因素,这能让人时刻保持警惕。而这些不确定性来自于哪里呢还是来自于瞬息万变的经济形势。因此正确的答案是A。答案B,这些不确定