It _______ them two weeks _______ the computer last year.
| A．takes; to work on | B．spends; working on |
| C．took; to work on | D．spent; working on |
It _______ them two weeks _______ the computer last year.
| A．takes; to work on | B．spends; working on |
| C．took; to work on | D．spent; working on |
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