9. Studyies show that young people with higher-than-average blood pressure and their families have a history of high blood pressure are more likely than others to develop a severe form of the condition.
正确答案：whose families have a history of high blood pressure.
为什么A不对，不够简洁吗？
21 Most teen-agers who work for pay hold jobs that requir few skills,(carry litte responsiblity,and offer no hope for career advancement).
上面已是正确答案，但想问一下：如果改成that requir few skills, litte responsibility and no hope for carreer advacement可以吗？作者: tongxun 时间: 2002-11-25 15:33
9、整个题目讲的是young people 的问题。而A 用and连接，表明了两个问题：
1）young people are more likely than
2）their families are more likely than
若这样的话，在逻辑上是不对的。
21、不对。require no hope for carreer advacement 是什么意思？作者: quncc 时间: 2002-11-25 17:38
