◎ 题干
—I’ll call you at 9 tomorrow morning, OK?
—You’d better not, I ______ the piano then.
A. will be practicing                                        B. am about to practice
  am practicing                                        D. practiced
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“ —I’ll call you at 9 tomorrow morning, OK? —You’d better not, I ______ the piano then. A. will be practicing B. am about to practice am practicing D. prac…”主要考查了你对  【一般现在时】【将来进行时】【过去完成进行时】【过去将来时的被动语态】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。