Experts have been warning___of the health risks caused by passive smoking.A．at a
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Experts have been warning___of the health risks caused by passive smoking.| A．at a time | B．at one time | | C．for some time | D．for the time |
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答案
| C |
解析
| for some time 意为“一段时间”，因为谓语用了现在完成进行时，所以要用for some time，表示从过去的某个时候开始一直延续到现在的一段时间内，专家一直警告说被动吸烟引起健康危急。at a time意为“每次,在某时”；at one time意为“同时,曾经”；for the time意为“暂时”。 |
举一反三
.Some students often listen to music___classes to refresh themselves.| A．between | B．among | | C．over | D．during |
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| The Los Angeles district attorney on Monday charged Michael Jackson"s personal physician, Conrad Murray, ______ involuntary manslaughter in connection with the pop icon"s death in June. |
When she left the restaurant, she also left the young boy with a life lesson: You can tell a lot about a person ______ he or she treats the waiter.| A．in a way | B．by the way | C．in any way | D．on the way |
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Don’t you think this shirt is too tight ________ the shoulders?| A．across | B．over | C．above | D．through |
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To ask someone for help is to turn ______him for a hand. |
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