(届北京市海淀区高三下学期期中练习英语试卷)You cannot take back your words ______ they are out of your mouth.
---Do you know _______? ----Sorry, I’ve no idea.
_____ by some red lanterns, our house looks beautiful, so I don’t think it needs ______.
Can you tell me ______ that the 29th Olympic Games will take place?
No sooner ______ on board the train than it______ to move.
It is not who is right but what is right ______ is of importance.