—Do you know he came?—I am not sure. Maybe for the toy car.A. howB. whenC. whyD. what

问题补充：

—Do you know he came?

—I am not sure. Maybe for the toy car.

A. how

B. when

C. why

D. what

答案：

A. how

B. when

(答案→)C. why

D. what

解析：考查宾语从句。本题定语从句why he came作为动词know的宾语。句意：—你知道为什么他会来吗？—不确定。也许是为了那个玩具汽车吧！根据第二句的maybe说明他不确定，根据为了那个玩具汽车吧！故知道对方询问的是why要来。故C正确。