题目

You’ll _______ the department until the end of the year.  Next year you will be rearranged.   A.  be attached to       B.  be belonged to     C.  owe to    D.  be addicted to 答案：B如图：A、B、C是⊙O上的三点，∠AOB=50°，∠OBC=40°，求∠OAC的度数．