题目内容：

Nobody can answer this question ,____Maria
A.so B.and C.but D.among
Radios are used ____ for people ____listening to the news
Radios are used ____ for people ____listening to the news 打错了 应该是Radios are used ___old people ____listening to the news 用介词填空

优质解答

1,C.but
2,by,for