In my opinion, keeping dogs well ________ up is advisable for dog owners.A．to t
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In my opinion, keeping dogs well ________ up is advisable for dog owners.| A．to tie | B．being tied | | C．tied | D．to be tied |
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答案
| C |
解析
| C 考察非谓语动词。句义：我认为，狗的主人应该把狗拴好。Tie和句子主语之间满意连词，使用非谓语动词，且tie与逻辑主语dogs构成被动关系，使用过去分词。故C正确。 |
举一反三
________ for a whole night, we still couldn"t agree on when to start and where to go for the holiday.| A．Discussed | B．Having discussed | | C．Discussing | D．Being discussed |
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Every morning Jack"s wife will stand before the mirror, ________ carefully until she has to go to work.| A．dressed | B．dressing | | C．to dress | D．having dressed |
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Our waste recycling project ________ a lot of investigation and paperwork had been done by the end of last term.| A．involved | B．to involve | | C．being involved | D．involving |
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During the flood many students volunteered ________ through the weekend, giving out food and water for the victims.| A．working | B．to work | | C．to have worked | D．having worked |
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________ that the Youth Olympic Games might be delayed due to severe air pollution, our government has made a promise to Jacques Rogge that they will spare no effort to settle the problem.| A．Warned | B．Having warned | | C．Warning | D．Being warned |
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