第13题: [简答题]A study in 26 countries shows that women using the pill for birth control are 5 times more likely to die of heart disease or hypertension than nonusers. But a Harvard Medical School study says that pregnancy is 5 times as likely to kill a woman as is the pill. 参考答案:根据26个国家的情况所作的一份调查报告表明：使用口服避孕药的妇女，因心脏病或高血压致死的可能性5倍于不使用这种避孕药的妇女。而哈佛大学医学院的一份研究报告则说，妇女因怀孕致死的可能性5倍于口服避孕药致死的妇女。
第30题: [单项选择]（）, I should not have wasted my time trying to explain matters to you. A. I had not realized what you intended B. Had I not realized what you intended C. I had realized what you intended D. Had I realized what you intended 参考答案:D
