题文
—Why do you look worried?—There are so many problems __________.
| A．remaining to settle |
| B．remained settling |
| C．remaining to be settled |
| D．remained to be settled |
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—Why do you look worried?—There are so many problems __________.
| A．remaining to settle |
| B．remained settling |
| C．remaining to be settled |
| D．remained to be settled |
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