______ the danger ahead on the railway line, he decided to go to Beijing by plane instead.
The most important thing ______they need is more time .
I lived in Beijing,_____is the capital of China.
After five hours’ drive ,they reached _____they thought was the place their parents had lived many years ago .
---I can’t find Mr. Smith .Where did you meet him this morning ? ---It was in the hotel ______he stayed .
Was it from the internet_____you learned the news _____a big fire broke out in the firework factory ?