Question

【题目】Paper and printing ________ in China.

A. were both invented B. was invented C. are both invented D. is invented

Answer 1

【答案】A

【解析】句意：造纸术和印刷术两者都是在中国被发明的。both表示两者都，位于be动词之后，实义动词之前。主语Paper and printing是复数，谓语用复数形式。结合句意，此处表示造纸术和印刷术过去被发明，故用被动语态，故选A。