If you are unable to attend the interview, for _____ reason, you should inform us immediately.

Is oxygen the only gas ________ helps fire burn?

riding along the street and allof a sudden, a car cut in and knocked me down.——You can never be _____careful in thestreet.

33Is it the letter you got yesterday ________ makes you so sad?

If it had not been for your help, I ____the examination.