问题补充：
I wanted to know .
A. how does he come here
B. how he comes here
C. how did he come here
D. how he came here
答案：
A. how does he come here
B. how he comes here
C. how did he come here
(答案→)D. how he came here
解析：句意：我想知道他怎么来这的。疑问词引导的宾语从句，语序：疑问词+主语+谓语动词+其它。结合语境主句是一般过去时，从句也应用一般过去时，故选D。
