问题补充：
I want to know.
A. when will he come
B. would he like to go shopping with me
C. if he had been back
D. why he is so angry
答案：
A. when will he come
B. would he like to go shopping with me
C. if he had been back
(答案→)D. why he is so angry
解析：此题重点考查宾语从句的时态和语序问题，无论哪种句式结构充当宾语从句都要用陈述句语序，从句的时态要和主句的时态保持一致。主句的谓语动词是过去式从句的谓语动词也要用相应的过去时态。若从句表达的是真理或客观事实，不管主句的谓语动词是何种时态从句都要用一般现在时。根据选择项的提示可知选择D。
