Beijing was attacked by such a terrible sandstorm __________few citizens has ever experienced before.
The manager was very angry, for he had sent his business partner two thousand machines yesterday, half of _________ unqualified.
John’s aim is to inform the viewers that cigarette advertising on TV is illegal, __________?
Sarah hopes to become a friend of _________ shares her interests.
--What is that building? --____________ the students have their dance classes.
When _________ by the reporter about his generous action, he said: “__________ others can always be joyful.”