问题描述：
1.It was the President h____ who opened the door.2.I have a little bit of e___ wroking in a hotel
3.He saw the accident o_____ to school.4.It takes a long time to learn to speak a l_____ well.
5.My mother was crying as I w_____ goodbye to her.
3.He saw the accident o_____ to school.4.It takes a long time to learn to speak a l_____ well.
5.My mother was crying as I w_____ goodbye to her.
问题解答：
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