单选题 Directions: For each blank
in the following passage, choose the best answer from the choices given below.
Mark your answer on the ANSWER SHEET by drawing with a pencil a
short bar across the corresponding letter in the brackets.
Smoking, which may be a pleasure for
some people, is a serious source of discomfort for their fellows. Medical
authorities express their {{U}}(31) {{/U}} about the effect of smoking
on the health not only {{U}}(32) {{/U}} those who smoke but also of
those who do not. In fact, nonsmokers who must involuntarily inhale the air
polluted by the tobacco smoke may {{U}}(33) {{/U}} more than the smokers
themselves. As you are doubtless aware, a considerable number of
our students have {{U}}(34) {{/U}} an effort to {{U}}(35) {{/U}}
the university to ban smoking in the classrooms. I believe they are entirely
right in their aim. {{U}}(36) {{/U}}, I would hope that it is possible
to achieve this by {{U}}(37) {{/U}} on the smokers to use good judgment
and show concern for others rather than {{U}}(38) {{/U}}
regulation. Smoking is prohibited by city laws in theaters and
in halls used for showing films as well as in laboratories {{U}}(39)
{{/U}} there may be a fire hazard. Elsewhere, it is up to your good
sense. I am therefore asking you to maintain "No Smoking" in the
auditoriums and classrooms. This will prove that you have to keep nonsmokers'
health and well-being {{U}}(40) {{/U}}, which is very important to a
large number of our students.
【正确答案】
A
【答案解析】[解析] 该空应填入一个可以与about连用的名词。根据上下文，concern在词义上最为合适，而且concern about sth./sb.意思是“对某事或某人的担心”。这句话的意思是说“吸烟影响了吸烟者本人及不吸烟者的健康，医学界权威对此表示担心”。
【正确答案】
D
【答案解析】[解析] not only…but also应该连接两个并列成分，既然后面…现了of those who do not，那么前面应该是of those who smoke，意思是吸烟既影响了吸烟者的健康，又影响了不吸烟者的健康。
【正确答案】
B
【答案解析】[解析] 四个选项词义都很相近，又有所不同，endure意为“忍耐”，suffer意为“遭受痛苦，受损害”，undergo意为“经历，经受不愉快的或痛苦的事物”，put up with意为“忍受或容忍”。根据上下文，suffer一词最为合适。该句意思是“事实上，与吸烟者相比，那些被迫吸入受到香烟污染的空气的不吸烟者将遭受更多的痛苦”。
【正确答案】
C
【答案解析】[解析] join意思是“成为……的一员”，join in sth.意思是“加入某活动中，一起做某事”，从上下文的意思看，C项join in更为合适。本题的四个选项提示考生应填一个动词，direct sb. to do sth.为“指示，命令某人做某事”，而directs sb. to do sth. 放在文中不仅意思不对，而且用法也不对，因此B项是错的。directs sb. at sth.为“使……转向或对准某一方向”，而D项中direct与at连在一起，中间没有宾语，在意思及用法上均不对。
【答案解析】[解析] 四个选项都是动名词，都可以做介词by的宾语。call on sb. to do sth.意为“恳求或促使某人做某事”，plead with sb. for sth.意为“再三恳求或请求某人做某事”，beg sb. for sth. 意为“祈求某人做某事”，insist on sth./doing sth.意为“坚决主张(或做)某事”。由此看来，选项D意思与上下文相符，而且只有call一词在用法上符合原文。
【正确答案】
B
【答案解析】[解析] rather than前后通常连接两个并列成分。从上下文意思看．by calling on the smokers to use good judgement and show concern for others与rather than后面的成分是并列的，因此，此处应该填入介词by。