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................. problems in sailing in tropical seas is the coral reefs.

Câu hỏi liên quan

• Choose below answer A, B, C or D to complete the sentence. He's not very ___________ at Math. I love English instead.

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  He’s strict, but you can usually get ...... him with humour

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  The kids are ____________ a blast running around the beach all day

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  She wondered whether to ...... on Jacbob on the way home

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  A number of companies have been putting _______________ on politicians to ease up on corporate taxes and regulations

• Choose the letter A, B, C or D to complete the sentence: We usually go swimming when the weather is_____________.

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  I don’t know ______________ about the world’s geography

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  What do you do _______your free time?

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  Forests ____ humans with many valuable things

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  A lot of generous businessmen have ____ valuable contributions to helping needy people

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  Money spent on new facilities isn't just buried in a hole somewhere, it's spent on construction and put ____________ into the economy

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  She's terribly upset because her father passed __________ last week

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  Mobile phones emit microwave radio emissions. Investigators are questioning whether exposure to these radio waves might (39) _____ to brain cancer. So far, the figures are not final. The precise evidence does not enable us to say in certain that mobile phones are definitely safe. On the other hand, recent research has not yet (40) _____ clear adverse effect associated with the prolonged use of mobile phones. Many studies are now going (41) _____ in numerous countries. Some of the results are contradictory but the others have shown an association between mobile phone use and cancer. However, these studies are preliminary and the issue need further, long – term investigation. (42) _____ the scientific data is more definite, it is advisable for people to try not to use mobile phone for long periods of time. Don’t think that hands free phones are any safer either. At the moment, research is in fact showing the opposite and they may be just as hazardous. It is also thought that young people (43) _____ bodies are still growing may be at particular risk

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  Phillip wants to successfully complete a few more projects before ------- applies for the vice president position.

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  Our teacher told us that if we don’t ___________ the environment, our grandchildren may not even be able to carry on living

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  Although the chemist’s initial experiment failed, she ________ upon a strong new material in the process

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  Tom showed ___________ at my door with flowers to apologize for his rude remarks

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  Her father cut her ........ without a penny

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  She had an unclear ________ of him in her mind, although she knew he would be old

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  I called them to .... more details