题文
A: Could I clean the bedroom for you ?
B: No, thanks. I ______ it myself.
| A．cleaned | B．have cleaned |
| C．was cleaning | D．had cleaned |
A: Could I clean the bedroom for you ?
B: No, thanks. I ______ it myself.
| A．cleaned | B．have cleaned |
| C．was cleaning | D．had cleaned |
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