单选题I like seeing kids h

问题补充：

单选题Ilikeseeingkidshappyand,ifthey＿，itmakesmyjobaloteasier.A.doB.areC.willD.have

答案：

B解析本题考查省略。They are后省略了happy, I like seeing kids happy and, if they are (happy)，it makes my job a lot easier.