单选题It was not until 3:00 pm________ the secretary found the missing report.

单选题. A British study found that B vitamins could reduce brain shrinkage in older people with mild memory loss. It showed that B vitamins caused an average one-third reduction in brain shrinkage among adults who had trouble remembering. Retired Oxford University pharmacology (药理学) professor David Smith was a leader of the study. He praised the use of the vitamins as simple and safe. He also said researchers do not yet know if B vitamins could prevent or slow Alzheimer's disease (老年痴呆症). Vitamins are important for good health. These complex organic substances help to carry out chemical changes within cells. If we do not get enough of the vitamins we need in our food, we are at risk of developing a number of diseases. Some shrinkage of the brain is thought to happen normally as people grow older. Yet studies have shown a link between a larger shrinkage and Alzheimer's disease. The Oxford researchers say about one in six people over age seventy has problems with mental operations. They say half of these people develop serious loss of mental ability, as in Alzheimer's disease. Over time, the disease robs people of their memories. Finally, it takes away their ability to care for themselves.1. According to the British study, B vitamins can help people who have troubles in ______.

单选题We talked for more than three hours without________a cup of tea.

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单选题5. The police officers in our city work hard ______ the rest of us can live a safe life.

单选题《复合题被拆开情况》 There are a few reasons why a home-based business may have trouble in securing business financing 筹集资金through a bank or credit union: Your business isn’t firmly established： If your busines

单选题 I'd like to introduce you ______ James Stewart

单选题The manager required that all the employees________ at the office before 9:00 in the morning.

单选题Retired people may feel lonely for being away from their former work and colleagues．

单选题 When I got to the company

单选题《复合题被拆开情况》 There are a few reasons why a home-based business may have trouble in securing business financing 筹集资金through a bank or credit union: Your business isn’t firmly established： If your busines

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单选题 Physics is the study of heat, sound, magnetism

单选题 As far as I'm concerned

单选题 Although we are suffering the natural disaster

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单选题《复合题被拆开情况》Notes:inconvenience不便satisfaction满意《问题》：Thecompanyismovingtoanewplacebecauseof________.

单选题It was in Jonson’s hotel________the business meeting was held last year.

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单选题1. The new product that they show at the fair still needs improving. ______