I like seeing kids happy and,if they＿,it makes my job a lot easier.a,are b.do c.will d.have

I like seeing kids happy and,if they＿,it makes my job a lot easier.a,are b.do c.will d.have
I like seeing kids happy and,if they＿,it makes my job a lot easier.a,are b.do c.will d.have

I like seeing kids happy and,if they＿,it makes my job a lot easier.a,are b.do c.will d.have
I like seeing kids happy and,if they＿,it makes my job a lot easier.
a,are b.do c.will d.have
答案：A
解析：if they are （happy）

I like seeing kids happy and, if they ____,it makes my job a lot easier.
选A.are