题文
There is no ______. I have to write it on the blackboard with ______.
| A．paper, chalks | B．paper, chalk | C．papers, chalks | D．papers, chalk |
There is no ______. I have to write it on the blackboard with ______.
| A．paper, chalks | B．paper, chalk | C．papers, chalks | D．papers, chalk |
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