They found the lecture hard ______； they all felt sleepy.A．to be understoodB．for

题干

They found the lecture hard ______； they all felt sleepy.

A．to be understood	B．for understanding
C．to understand	D．to have been understood

上一题下一题 0.94难度单项选择更新时间:2019-09-11 10:36:22

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