题文
It took them ___ time to finish the challenging task.
| A．a number of |
| B．a lot |
| C．a great deal of |
| D．a good many |
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It took them ___ time to finish the challenging task.
| A．a number of |
| B．a lot |
| C．a great deal of |
| D．a good many |
试题篮
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