问题
5 On their arrival on the airport, ___________
A:a group of children welcomed them with flowers
B:bunches of flowers were presented to them by a group of children
C:they were presented with flowers by a group of children
D:they were welcome by children with flowers
B:bunches of flowers were presented to them by a group of children
C:they were presented with flowers by a group of children
D:they were welcome by children with flowers
正确答案是：
