[单项选择]Smoking is a very bad habit, which many people find difficult to ______.
A. break
B. beat
C. breathe
D. cough

[单项选择]Smoking is a very bad habit, which many people find difficult to ______.
A. break
B. beat
C. breathe
D. cough

[单项选择]

Smoking, which may be a pleasure for some people, is a serious source of discomfort for their fellows. (21) ,medical authorities express their concern about the effect of smoking (22) the health not only of those who smoke but also of those who do not. In fact, non-smokers who must involuntarily inhale (吸入) the air (23) by tobacco smoke may suffer more than the smokers (24) ．
Smoking is prohibited in the theatres and in the halls used for showing films (25) in laboratories (26) there may be a fire hazard (危险). Elsewhere, it is up to your good (27) ．
I am (28) asking you to maintain "No-Smoking" in classrooms and seminar rooms. This will prove that you have the (29) health in mind, which is very important to a large (30) of our students.

21（）
A. non-smokers
B. non-smokers'
C. non - smoker' s
D. non - smoker

[单项选择]Many statutes which are stated in very general terms ______.
A. are strictly applied
B. make the job of the lawyer and the judge very simple
C. carefully define every aspect of those terms
D. take on real meaning only as the courts interpret them

[单项选择]The seventeenth century was one (which) many significant (advances) (were made) (in both) science and philosophy.
A. which
B. advances
C. were made
D. in both

[单项选择](The seventeenth) century was one (which) many significant (advances) (were made) in both science and philosophy.
A. The seventeenth
B. which
C. advances
D. were made

[单项选择]A habit of reading, good or bad, might NOT affect___________.
A. the speed
B. the comprehension
C. the eye-movement
D. word symbols

[单项选择]Don't risk ______ the chance which so many people dream of.


A. losing
B. to lose
C. lost
D. your life to lose