单项选择题
There are nations whose lack of contact with the outside with the outside world has（）poverty.
A.fallen into B.consisted in C.resulted in D.come up to
单项选择题 We lived on a（）when my wife studied in Oxford. It is quiet there, so very suited for a student.
单项选择题 I don't want you to make any trouble,（）, I urge you to solve the problem.
单项选择题 We have kept（）our friendship by writing to each other, so we are true friends.
