There is no . I have to write it on the blackboard with .A. paper chalksB. paper chalkC.

问题补充：

There is no . I have to write it on the blackboard with .

A. paper, chalks

B. paper, chalk

C. papers, chalks

D. papers, chalk

答案：

A. paper, chalks

(答案→)B. paper, chalk

C. papers, chalks

D. papers, chalk

解析：句意：没有纸了，我只能用粉笔在黑板上写了。Paper纸，不可数名词；chalk粉笔，不可数名词；两者都没有复数形式，故选B。