题文
–Cathy, can you answer the door? I ______ the room. –I’m coming, mum.
| A．clean | B．cleaned |
| C．have cleaned | D．am cleaning |
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–Cathy, can you answer the door? I ______ the room. –I’m coming, mum.
| A．clean | B．cleaned |
| C．have cleaned | D．am cleaning |
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