Question

－Who designed this game?

－It ________ by Tom in 1999．

[　　]

A．is designed

B．designs

C．was designed

D．designed

Answer 1

答案：C
解析：

考查一般过去时的被动语态。主语和谓语动词之间是被动关系，应用被动语态；根据时间状语“in 1999”可知应用一般过去时，所以选择答案C。