[单项选择]We have received orders ______ USD 1,000,000 since the new product was introduced to the market.
A. amount for
B. amount to
C. account for
D. amounting to

[单项选择]We have received orders ______ USD 1,000,000 since the new product was introduced to the market.
A. amount for
B. amount to
C. account for
D. amounting to

[单项选择]Since we have never been here before, we do not know which bus （　）.
A. should we take'
B. to be taking
C. to take
D. should take

[单项选择]Three years have （　） since we last met at the conference for Internet communication in Beijing.
A. elapsed
B. discerned
C. discontented
D. electrified

[单项选择]We have been doing business in this line since the end of World War II. Which of the following can be used to replace the underlined word without changing the meaning of the sentence:（　）
A. business
B. occupation
C. profession
D. trade

[填空题]For years we have believed we were either healthy or sick. __51__, during the mid-90s, scientists developed a new concept called “sub-health”, a status __52__ health and illness. The concept of sub-health has become __53__ because it has helped to explain many health problems. __54__ one study, only 5.6% of people in the overall population are actually sick, __55__ the sub-healthy group consists of about 60%, and the __56__ population is considered healthy. __57__ 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 __58__ turning from health to illness or from illness to health. Our bodies are actively __59__ the conditions of health, sub-health and disease. Factors __60__ 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-healthy status to a healthy one.
A. A．Besides
B．However
C．Meantime
D．Therefore

[填空题]We ______ (have) no news of Jerry since he left his hometown last year.

[单项选择]All of US have felt pain．We have cut ourselves．We have been burned．Or we have had headaches．Some of us suffer pain rarely pain rarely. ___________ (46) Pain can take complete control of our body and mind，making it impossible to move and even to think．Yet we need pain．Without it，we would not know．1f we have hurt ourselves．It is our body’s warning system. ___________ (47) Pain is the most common reason we go to a doctor It is the most common reason we take medicines．Until recently，however, most doctors knew of only a few drugs that stopped some pains ___________ (48)But new knowledge about the process of pain is helping them to control pain better． Scientists have learned that the sense of pain is made up of both chemical and electrical signals. ___________ (49)Scientists also have learned that the nervous system sends two different kinds of pain messages to the brain：one very fast，the other slow．The first message is the warning signal．It moves at a speed of 30 meters a second．In les