杆形卡环不具备的优点是（） A.弹性好 B.固位作用好 C.对基牙损伤小 D.不易存

根据对话内容，从对话后的选项中选出能填入空白处的最佳选项，并在答题卡上将该项涂黑。选项中有两项为多余选项。（共5小题；每小题2分，满分10分）
W: Bobby, turn that TV off and set the table. Dinner is almost ready.
M: OK. I’ll be right down…
W:   1  Your father’s plane was delayed, so he won’t be home until after 10:00.
M: Aw, man! Why does he always have to travel so much?   2 
W: I know. Your sister and I feel the same way, but this is the way it has to be right now.
M:   3 
W: That’s because I work from home.   4  Your father is gone a lot, but he also makes good money.
M: Why doesn’t he work from home?
W:   5  If he stayed at home, how would he ever sell anything?

A. Yes. Father works too hard. B. But you never travel for your job. C. Dear, we’ll have to wait for your father. D. I feel like I never get to see him anymore. E. I guess I’m lucky, but there are disadvantages, too. F. Honey, there are only going to be three of us tonight. G. Well, working in sales means you have to be on the road a lot.