选词填空。
arewerecapitalwassouthyoungeastoninabout
1. Washington D.C.is the ______ of the USA.
It's in the ______．
2. They ______, ______ then.
Now they ______ old.
3. Sanya is in the ______ of China.
4. She ______ very clever.
5. It's a book ______ England.
6. There are many boats ______ the river.
7. People speak English ______ America.