As a boy of six, .A.Tim’s parents asked him to play the piano every day.B.Tim and his parents would play the piano together.C.Tim had to practice playing the piano every day.D.to learn playing the piano is too hard for Tim.
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C解析考查前后主语保持一致。根据句意作为一个六岁的男孩，从选项中可以看出是Tim，根据主语前后一致的原则，可选出