单项选择题
M: Are these shoes on sale, too W: No, they aren’t. They are selling at the regular price of fifty dollars.
A.Yes, at the lower price. B.Yes, but not at a lower price. C.No, they are not for sale.
A.To study the secrets of the earth and the sky. B.To experience the world’ s worst weather. C.To prove team work possible.
A.The shop was on fire twice. B.The shop closed twice. C.The shop was broken into twice at night.