Question

[Bảo Linh Nguyễn Thị]

Mosquitoes

  According to the World Health Organisation, malaria, a disease spread (0) ___________ mosquitoes, affects millions of people every year. Everyone knows how irritating the noise made by a mosquito, (1) ________ by a painful reaction to its bite, can be. It is astonishing that so (2) _________ is known about why mosquitoes are drawn to or driven away from people, given the level of distress and disease caused by these insects. We know that the most effective chemical (3) __________ protecting people against mosquitoes is diethyltoluamide, commonly shortened to deet. (4) __________ deet works well, it has some serious drawbacks: it can damage clothes and some people are allergic to it.

  Scientists know that mosquitoes find some people more attractive than others, but they do not know (5) ________ this should be. They also know that people vary in (6) _________ reactions to mosquito bites. One person has a painful swelling while (7) __________ who is bitten by the same mosquito may hardly notice. Scientists have never discovered the reason for this, but they have carried (8) _________ experiments to show that mosquitoes are attracted to, or put off by, certain smells. In the future, scientists hope to develop a smell that mosquitoes cannot resist. This could be used in a trap (9) _________ that, instead of attacking people, mosquitoes would fly into the trap and be destroyed. For the time (10) _________ however, we have to continue spraying ourselves with unpleasant liquids if we want to avoid getting bitten.

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Answer 1

[Xuan Mai]

Mosquitoes

  According to the World Health Organisation, malaria, a disease spread (0) ____by____ mosquitoes, affects millions of people every year. Everyone knows how irritating the noise made by a mosquito, (1) __followed______ by a painful reaction to its bite, can be. It is astonishing that so (2) __little______ is known about why mosquitoes are drawn to or driven away from people, given the level of distress and disease caused by these insects. We know that the most effective chemical (3) __for_____ protecting people against mosquitoes is diethyltoluamide, commonly shortened to deet. (4) __Although_____ deet works well, it has some serious drawbacks: it can damage clothes and some people are allergic to it.

  Scientists know that mosquitoes find some people more attractive than others, but they do not know (5) __why_____ this should be. They also know that people vary in (6) ___their____ reactions to mosquito bites. One person has a painful swelling while (7) ___another_______ who is bitten by the same mosquito may hardly notice. Scientists have never discovered the reason for this, but they have carried (8) __out_______ experiments to show that mosquitoes are attracted to, or put off by, certain smells. In the future, scientists hope to develop a smell that mosquitoes cannot resist. This could be used in a trap (9) ___so_____ that, instead of attacking people, mosquitoes would fly into the trap and be destroyed. For the time (10) ___being______ however, we have to continue spraying ourselves with unpleasant liquids if we want to avoid getting bitten.