问题补充：
his father came back from work his homework.
A. Not until; he did
B. It wasn until; when he did
C. It was until; that he didn do
D. It wasn until; that he did
答案：
A. Not until; he did
B. It wasn until; when he did
C. It was until; that he didn do
(答案→)D. It wasn until; that he did
解析：可联系答.案.网客服索取。
