Antique cars are seen very _____ these days because they are extremely expensive to maintain.

Antique cars are seen very _____ these days because they are extremely expensive to maintain. A. hardly B. uneasily C. weakly D. infrequently

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从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性。

从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性。

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