It’s important _________ us _________ _English well.
There is _____ river at the foot of the mountain(山)._____ river is dangerous.
I’ll call you _________I get to Beijing.
--- Will you take part in Mary’s birthday party?--- I’v no idea. But if Lucy doesn’t go there, _________.
For a foreigner like me, the more I learn about Chinese history, ___I enjoy living in China
--- I don’t think teenagers should drive cars.--- ____.They aren’t serious enough.