The teacher is too busy ________ his work ________ you with your English.A．d

题干

The teacher is too busy ________ his work ________ you with your English.

A．doing; helping

B．doing; to help

C．to do; to help

D．to do; helping

上一题下一题 0.4难度单选题更新时间:2018-02-28 07:17:17

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