Have you realized the difficulty we have ____ the problem?A．worked out B．to work
题型：不详难度：来源：
Have you realized the difficulty we have ____ the problem?| A．worked out | B．to work out | C．work out | D．working out |
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答案
| D |
解析
| 考查固定句型。have difficulty/trouble (in) doing sth.“做某事有困难”。句意“你意识到我们在解决这个问题时，遇到的困难吗？”根据固定句型可知，选D。 |
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