1. —____ you play the piano at such a late time? It's midnight!

—I didn't notice the time. I ____ earlier.

A. Must;shouldhavebegun B. Must;musthavebegun C. Would; can't have begun D. Would;couldhavebegun
【考点】
情态动词have done的用法; 情态动词的辨析;
【答案】

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