My uncle’s house in the downtown area is much smaller than ours , but it is twice _______ expensive .
All he was thinking about was ____ he would do with the big sum of money his father gave him.
23. The harder we work at our lessons, _____.
22. The government officials say that the Art Festival aims at _____ the relationship between nations.
21. After the new technique was introduced, the factory produced ______ cars in 2009 as the year before.
The bird hid _____ food inside trees for the winters.