Not only ________learn a foreign language, but also ______ master it well.
| A．must we ; we must | B．must we ; must we |
| C．we must ;’ we must | D．we must ; must we |
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Not only ________learn a foreign language, but also ______ master it well.
| A．must we ; we must | B．must we ; must we |
| C．we must ;’ we must | D．we must ; must we |
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