问题：
【题文】—What do you think this coat is made _____?
—Wool. It’s used for _____.
A．of, keeping warm
B．from, keeping warm
C．in, keeping warmly
D．of, keeping warmly
【题文】—What do you think this coat is made _____?
—Wool. It’s used for _____.
—Wool. It’s used for _____.
| A．of, keeping warm | B．from, keeping warm |
| C．in, keeping warmly | D．of, keeping warmly |
参考答案：