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It worried her a bit_______her hair was turning grey.

Could I speak to_______is in charge of International Sales please?

A modern city has been set up in_______was wasteland ten years ago.

---Grandpa, what did the doctor say?
---He advised me to live_______ the air is fresher.

This is an illness that can result in lung cancer ____ left untreated.

She always allows the children to voice their opinions_________sometimes their opinions are not sound.

. –You see, I’m poor in maths, you are not good at English, and……
--That’s_________we should help each other.

The general at last got a chance to visit the village_________he used to fight, _________he had been dreaming of for years.

The American Civil War lasted four years_______the North won in the end.

_______she was sick,I was expected to take her place greatly surprised me ,for I didn’t have much work experience.