填写单词。 根据句子意思， 在空格中填写适当的单词， 使句子完整、正确。

1. We all know that the earth ________ around the sun.

2. The ______ day of a week is Monday.

3. A ______ is a place which keeps many old things and people usually visit.

4. Hong Kong is in the ______ of China.

5. This pair of shoes are too big. Please show me ______ one.

6. It ______ us one hour to get to Wuhan by bus last Sunday.

7. The ______ you work, the more you get.

8. The 15th Asian Games was ______ in Doha in 2006.