问题补充：
The couple only stayed togetherthe children.
A. in the hope of
B. for the purpose of
C. in the name of
D. for the sake of
答案：
A. in the hope of
B. for the purpose of
C. in the name of
(答案→)D. for the sake of
解析：in the hope of希望做……;for the purpose of为了……的目的;in the name of凭……的权威;for the sake of为了……的缘故。
