The police are looking for those who ________ the accident ________ happened last night．
A.have witnessed; that
B.has witnessed; which
C.have witnessed; what
D.has witnessed; that
网友回答
A解析本句的句意为“警察正在寻找目击昨晚事故的那些人”。第一个定语从句中的先行词是those，所以从句中的谓语动词用复数形式。第二个也是定语从句，所以不能用what。