41　(spend)toomuchtimeonlinecanincreaseyourriskofcatchi...

问题详情：

41　(spend) too much time online can increase your risk of catching 　42　cold or the flu，scientists have warned. Those with greater levels of Internet 　43　 (addict) are more likely to give in to illness 　44　those who spend fewer hours online. Researchers believe the reason lies　45　the fact that people with an Internet addiction are more lonely，and as a result have 　46　(weak) immune(免疫)systems. They said the lack of interaction with other people and less time spent outside 　47　 (expose) themselves to germs(细菌)played a role. Past studies also 　48　(find) people who spend more time online experience greater sleep problem, have 　49　(bad) eating habits, do less exercise and tend to smoke and drink more alcohol. These 　50　(behave) can harm their immune system and increase chances of getting diseases.

【回答】

41．spending

42．a

43．addiction

44．than

45．in

46．weakened/weaker

47．exposing

48．have found

49．worse

50．behaviors

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