When first __________ to the market, the computer software was not a success du
题型：不详难度：来源：
When first __________ to the market, the computer software was not a success due to its complexity in operation. | A．introducing | B．being introduced | | C．introduced | D．to be introduced |
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答案
| C |
解析
| 本题考查非谓语动词。句中逻辑主语为the computer software，与introduce的关系为被动关系，故用过去分词，选C。 |
举一反三
It remains doubtful whether the project _____________ next month will bring profits to the company. | A．accomplished | B．to be accomplished | | C．having accomplished | D．being accomplished |
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Professor Smith, along with his assistants, ________ on the project day and night to meet the deadline.| A．work | B．working | C．are working | D．is working |
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I prefer studying English at home the match.| A．to watching | B．to watch | C．rather than watch | D．rather than watching |
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