―You couldn't have chosen any gift better for me.

　 ― ____.

A．I'm sorry I can't let you be satisfied.

B．That's all right. I’ll give you a better one next time.

C．I'm glad you like it so much.

D．You have a gift for music, don't you?

所有煤与瓦斯突出矿井都应建设井下紧急避险设施。其他矿井不应建设井下紧急避险设施。