Fill in the gaps with suitable prepositions or adverbs where necessary. 1. his behavior understanding. 2. fluctuating prices are usually public goods. 3. the students are excited and the same holds their teachers. 4. we are spending a lot food than we used to. 5. they derive such great enjoyment simple games. 6. whether we shall go or not depends final decision. total over 250 people attended the conference.

1. His behavior is beyond my understanding.
2. Fluctuating prices are usually based on public demand for certain goods.
3. The students are excited and the same holds true for their teachers.
4. We are spending a lot more on food than we used to.
5. They derive such great enjoyment from these simple games.
6. Whether we shall go or not depends on your final decision.
7. In total over 250 people attended the conference.