问题补充：
----What did he want to know,Anne?
-----I could finish writing the report.
A. When was it
B. It was when that
C. It was when
D. When it was that
答案：
A. When was it
B. It was when that
C. It was when
(答案→)D. When it was that
解析：本句承接上文考查know的宾语，所以回答应该是陈述语序的名词性从句。When 引导的强调结构的特殊问句作宾语，用陈述语序。
【标签】强调结构
