[单项选择]（　）we have finished the text, we shall start doing more revision exercises.
A. For now
B. Since that
C. Now that
D. By now

[单项选择]We have finished the course, （） we shall start doing more revision work.
A. For now
B. Since that
C. Now that
D. By now

[单项选择]（）we have finished the course, we shall start doing more revision work.
A. For now
B. Since that
C. Now that
D. By now

[单项选择]（） we have finished the course, we shall start doing more revision work.
A. For now
B. Now that
C. Ever since
D. By now

[填空题]______(既然我们学完了这门课程) , we shall start doing more revision work.

[单项选择]For about three centuries we have been doing science, trying science out, using science for the construction of what we call modern civilization. Every dispensable item of contemporary technology, from canal locks to dial telephones to penicillin, was pieced together from the analysis of data provided by one or another series of scientific experiments. Three hundred years seems a long time for testing a new approach to human interaction, long enough to settle back for critical appraisal of the scientific method, maybe even long enough to vote on whether to go on with it or not. There is an argument.
Voices have been raised in protest since the beginning, rising in pitch and violence in the nineteenth century during the early stages of the industrial revolution, summoning urgent crowds into the streets any day on the issue of nuclear energy. The principal discoveries in this century, all in all, are the glimpses of the depth of our ignorance about nature. Things that used to seem c
A. Scientific experiments in the past three hundred years have produced many valuable items.
B. For three hundred years there have been people holding hostile attitude toward science.
C. For centuries scientific discoveries have been hailed by the human world unanimously.
D. Three hundred years is not long enough to settle back for critical appraisal of the scientific method.

[单项选择]We have not fixed the date（　） we shall start our holidays.
A. and
B. that
C. when
D. which

[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. Thanks to
B. Due to
C. According to
D. Prior to