单项选择题
A. I’m sorry you can’t. B. Sure, it’s my pleasure. C. Well, take things easy. D. I’ll be glad to. E. Thank you. F. Really G. You’re always welcome. H. I’m sorry to hear that.
A．may be inhabited by attractive Martians B．may have some vegetable life C．can have no life at all D．may have both vegetable and animal life