21. The effect of smoking on women has not been paid enough attention because______.

　　A. men suffer more from smoking

　　B. men would like women to smoke

　　C. men are considered the main sufferers of smoking

　　D. there are alarming statistics of death caused by smoking

　　22. "This is no longer the case. " The word "this" refers to______.

　　A. that men used to suffer the ill-effects

　　B. that there were alarming statistics

　　C. that the scale of threat become larger

　　D. that women suffered from smoking as greatly as men

　　23. From the fact that in some developed countries smoking is now more common among teenage girls than boys, we can predict that in the days to come, ______.

　　A. women will have the same diseases as men

　　B. more women may suffer from smoking than men

　　C. the smoking rates among men and women will drop

　　D. the teenage girls today may give up smoking when they are grown-ups

　　24. All of the following statements are the effects of smoking on women EXCEPT that

　　A. the death rates of the women and men who are smoking are in similar proportion

　　B. smoking causes the same diseases in women as in men

　　C. in the past 20 years, death rates in women from lung cancer have more than doubled

　　D. smoking is responsible for 30 percent of all cancer deaths among women

　　25. In the phrase "lethal stroke", the word "lethal" most probably means______.

　　A. causing death B. causing discomfort

　　C. causing poor health D. causing anxiety

　　四級英語閱讀訓(xùn)練答案：

　　21. C 22. A 23. B 24. C 25. A