艾滋病、乙肝和丙肝不会通过下列哪些方式传播？（）
A.马桶圈、浴池或泳池
B.餐饮具
C.社交接吻、拥抱
D.蚊虫叮咬
参考答案：A, B, C, D
_______ your letter, I am pleased to tell you that you are to receive the answer by the end of this week.
A．Concerned about
B．Concerning
C．Concerning with
D．Concerned
