Tom, clean up the broken glass _________ someone walks on it.
It is reported that the countries attending the opening ceremony of the London Olympics ______ 229.
In recent years______global warming is becoming______concern for people all over the world.
--- How do you find the movie last night?--- ______, but the background music sounded wonderful.
It’s that time of the year again, ______ Apple fans go crazy about the coming of the new iPhone.
---Look at the girls swimming over there! How wonderful!---Yes, ______ they were the fishes!