题文
A cat, ______ it is a white one ______ a black one, is considered to be a good cat as long as it can catch mice.
| A．both; and | B．not only; but also |
| C．either; or | D．whether; or |
A cat, ______ it is a white one ______ a black one, is considered to be a good cat as long as it can catch mice.
| A．both; and | B．not only; but also |
| C．either; or | D．whether; or |
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