Выберите нужный союз. Do you know the doctor _______ operated on my husband: ответ на тест 1072064 - Английский язык

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Do you know the doctor _______ operated on my husband?

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He is _______ a good doctor and a clever man.

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She took an umbrella _______ it was raining outside.

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Diana called the police _______ she realized that someone had broken into her flat.

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Environmental protection is of a universal concern. That is why serious measures to create a system of ecological security should be taken. Some progress has been already made in this direction. As many as 159 countries – members of the UNO – have set up environmental protection agencies. Numerous conferences have been held by these agencies to discuss problems facing ecologically poor regions including the Aral Sea, the South Urals, Kuzbass, Donbass, Semipalatinsk and Chernobyl. An international environmental research centre has been set up on Lake Baikal. The international organisation Greenpeace is also doing much to preserve the environment. But these are only the initial steps and they must be carried onward to protect nature, to save life on the planet not only for the sake of the present but also for the future generations.
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At the beginning of this century medical scientists made a surprising discovery: that we are built not just of flesh and blood but also of time. They were able to demonstrate that we all have an internal “body clock” which regulates the rise and fall of our body energies.
Scientists have identified the following three biorhythmic cycles: physical, emotional and intellectual. Each cycle lasts approximately 28 days and each is divided into a high energy period and a low energy period of equal length.
During the low energy period we are less resistant to illness and tire more easily. The low period puts energy into our “batteries” for the next high period. During the high energy period of a physical biorhythm we are more resistant to illness, better coordinated and more energetic.
The “critical” or weakest time is the time of changeover from the high energy period to the low energy period, or vice versa. On the critical day of a physical biorhythm, there is a greater chance of accident and illness.
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