Most Americans would prefer to keep their problems themselves, and solve their problems themselves.
A. to; by
B. by; to
C. for; to
D. in; on
网友回答
(答案→)A. to; by
B. by; to
C. for; to
D. in; on
解析：句意为：大多数美国人宁愿让他们对自己的问题并自己解决他们的问题。By oneself表示“单独地，独自地”的意思。