Ex. 3. Fill in prepositions to complete the sentences. 
 1. Your jokes are wasted ___ him. 
 2. The ancient palace was all ___ flames. 
 3. The little girl was absorbed ___ the book she was reading and didn’t notice me. 
 4. ___ that point the man was interrupted. He didn’t quite enjoy it. 
 5. In his speech Mr. Woodriff pointed ___ several drawbacks of the plan. 
 6. We could watch ducks floating ___ the water. 
 7. A piece of wood was floating ___ the stream.