Unfortunately, the aboriginal(土著) people tried in vain to win independence ______ the ruling tribe,

and prejudice ______ them still continued.[ ]

A. of, towards

B. on, for

C. from, against

D. by, over

治疗钩端螺旋体病首选的药物是（）。

A.红霉素

B.氯霉素

C.四环素

D.链霉素

E.青霉素G