题目

—What’s Jim doing now  ?—He ________ TV with his father in the living room.      A. is watching        B. are watching       C. is watch       D. are watch 答案：A某商店举办有奖销售活动，办法如下：凡购物满100元者得奖券一张，多购多得，每10000张奖券为一个开奖单位，设特等奖1个，一等奖50个，二等奖100个，那么买100元商品的中奖概率应该是 [　　] A．B． C．D．