[单项选择]We have a high regard for Prof. Joseph because he always ______ his principles.
A. lives on
B. lives up to
C. lives through D. lives with

[单项选择]We consider （　） he should have left without telling anyone beforehand.
A. strange why
B. it strange what
C. it strange that
D. that strange

[单项选择]Rarely we have seen such an effective actor as he has proven himself to be.
A. Rarely
B. we have seen
C. as he
D. to be

[单项选择]

For years we have believed we were either healthy or sick. (55) , during the mid-90s, scientists developed a new concept called "sub-health", a status (56) health and illness. The concept of sub-health has become (57) because it has helped to explain many health problems. (58) one study, only 5. 6% of people in the overall population are actually sick, (59) the subhealthy group consists of about 60%, and the (60) population is considered healthy. (61) of one’s sub-health will help one to be alert to the underlying disease and remain healthy. Sub-health is a state in which the body is (62) turning from health to illness or from illness to health. Our bodies are actively (63) the conditions of health, sub-health and disease. Factors (64) aging, internal or external toxicity (毒性), and body or mind exhaustion may cause sub-health, but taking good care of the body can change a sub-
A. Causes 
B. Awareness 
C. Doubts 
D. Treatment

[单项选择]In recent years, researches have suggested more health value from vitamin D than had once been thought.
Vitamin D is (62) naturally in the blood. Sunlight is a (63) source. It is also found in some foods. Vitamin D helps to increase levels of calcium in the blood. It helps build strong bones and teeth.
It also (64) to do more than just protect against rickets (软骨病). That serious bone disease was the reason why vitamin D was added to milk. Rickets is now (65) in the western world. But it is still a common childhood disease in developing countries. Rickets can and is also (66) to cause bone pain and weakness, teeth problems and muscle (67)
According to the study by the Harvard School of Public Health, Vitamin D might protect against multiple sclerosis (硬化症), also called MS.
MS is a (68) disease of the central nervous system that (69) about two million people around the worl
A. do
B. get
C. make
D. gain