从四个选项中,选出可以填入空白处的最佳选项,
21
.—Good morning , May I help you ?
—Oh, thank you.I’m just looking around.
—_______________.
A.Thanks for coming to see me . B.How are you feeling today?
C.I’ll write you a check right now. D.Take your time , then.
22.What shall we use for power when all the oil in the world has ______?
A.given out B.put out C.held up D.used up