Question

—How many pieces of music could he play?

—Over 600 pieces. Many of these________ by himself.

A.have written B.were written

C.were writing D.wrote

Answer

B

【解析】

句意：——他能演奏多少首乐曲？——600多首。其中很多都是他自己作曲的。

考查一般过去时的被动语态。have written现在完成时，主动语态；were written一般过去时的被动语态；were writing过去进行时，主动语态；wrote一般过去时，主动语态。根据答语“Many of these________ by himself”可知，主语Many of these指的是“很多歌曲”，歌曲是被他自己创作的，此处应为被动语态，且根据语境可知本句时态为一般过去时，故此处应为were written。故选B。