Jennifer Jones, 15, told friends in her class that she was feeling unwell. She then passed     1     in her morning PE lesson and     2     (rush) to hospital.

Jennifer was found to have     3     (danger) low blood sugar levels and was treated immediately. Her worried parents told the doctor that their daughter missed breakfast that day     4     hardly touched her dinner the night     5    . Fortunately, she is now out of danger. Her doctor says that she will make a full recovery     6     a day or two.

Jennifer’s classmates hope to see her back at school soon.    7     say that she has struggled with eating problems for a long time. “Jennifer thought that skipping meals would be a simple way     8     (reach) her target weight,” her friend Laura Williams told our reporter. “She has not eaten breakfast for the last few months. She told me she had trouble     9     (concentrate) in class. I warned her that skipping meals was     10     (health), but she wouldn’t listen.”

In g    1    , doctors in those days had two c    2    theories to explain how cholera spread. One theory was that bad air caused the disease. Another was that cholera was caused by an i    3    from germs in food or water. Snow s    4    to the second theory. It was correct, but he still needed p    5    . Consequently, when an o    6    of cholera hit London in 1854, Snow began to investigate. He discovered that in two particular streets the cholera outbreak was so severe that more than 500 people died in ten days. He was determined to find out why.

Cholera used to be one of the most     1     diseases in the world, until a British doctor, John Snow, showed how it could be     2    . This illness causes severe diarrhoea, dehydration, and even death. In the early 19th century, when an outbreak of cholera hit Europe, millions of people died from the disease. As a young doctor, John Snow became     3     because no one knew how to prevent or treat cholera. In time, he rose to become a famous doctor, and even     4     to Queen Victoria when she gave birth. However, he never lost his desire to    5     cholera once and for all.

In general, doctors in those days had two     6     theories to explain how cholera spread. One theory was that bad air caused the disease. The other was that cholera was caused by an     7     from germs in food or water. Snow     8     to the second theory. It was correct, but he still needed     9    . Consequently, when an outbreak of cholera hit London in 1854, Snow began to investigate. He discovered that in two     10     streets the cholera outbreak was so severe that more than 500 people died in ten days. He was determined to find out why.

…However, whether it was possible to develop a hybrid of self-pollinating plants such as rice was a matter of great debate. The common     1     then was that it could not be done. Through     2     effort, Yuan overcame enormous technical difficulties to develop the first hybrid rice that could be used for farming in 1974. This hybrid     3     farmers to expand their output greatly.