题文
—Do you hear the noise outside?
—Yes．There must be some kids________outside．
| A．have fun |
| B．has fun |
| C．to have fun |
| D．having fun |
—Do you hear the noise outside?
—Yes．There must be some kids________outside．
| A．have fun |
| B．has fun |
| C．to have fun |
| D．having fun |
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