题文
It’s important ___ us to protect the environment and it’s wise ____ us to save water .
| A．for , for | B．of , of | C．for , of | D．of , for |
It’s important ___ us to protect the environment and it’s wise ____ us to save water .
| A．for , for | B．of , of | C．for , of | D．of , for |
试题篮
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