They seemed to be too busy _________ to us.A．practising speakingB．to practise sp

题干

They seemed to be too busy _________ to us.

A．practising speaking	B．to practise speaking
C．practising to speak	D．to practise to speak

上一题下一题 0.65难度单选题更新时间:2018-03-30 12:02:03

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