题文
It was playing computer games that cost the boy plenty of time that he ________ have spent doing his lessons.
| A．might |
| B．must |
| C．ought to |
| D．could |
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It was playing computer games that cost the boy plenty of time that he ________ have spent doing his lessons.
| A．might |
| B．must |
| C．ought to |
| D．could |
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