_______ such heavy pollution already, it may now be too late to clean up the riv
题型：不详难度：来源：
_______ such heavy pollution already, it may now be too late to clean up the river. | A．Having suffered | B．Suffering | C．To suffer | D．Suffered |
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答案
| A |
解析
| 句意为“这条河已经遭受如此严重的污染，现在要想清理也许为时已晚了”。suffer 发生在 clean up 之前，且有 already 暗示，无疑要用现在分词的完成式作状语。 |
举一反三
_______ the general state of his health, it may take him a while to recover from the operation.| A．Given | B．To give | C．Giving | D．Having given |
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When I handed the report to John, he said that George was the person _______. | A．to send | B．for sending it | C．to send it to | D．for sending it to |
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It is said that in Australia there is more land than the government knows _______. | A．it what to do with | B．what to do it with | | C．what to do with it | D．to do what with it |
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In order to make our city green, _______. | A．it is necessary to have planted more trees | B．many more trees need to plant | | C．our city needs more trees | D．we must plant more trees |
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_______ in thought, he almost ran into the car in front of him. | A．Losing | B．Having lost | C．Lost | D．To lost |
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