Do you still remember the rider and his new bike we saw in the street last week?A. whichB.

问题补充：

Do you still remember the rider and his new bike we saw in the street last week?

A. which

B. who

C. that

D. whom

答案：

A. which

B. who

(答案→)C. that

D. whom

解析：考查定语从句。当先行词不只有一个时，引导词用that，根据先行词the rider and his new bike可知选C。