I. Fill in the blank in each of the following sentences with a suitable preposition or adverb. ( 1*5=5 points ) 1. The two sides failed to agree ______ the wording of a final report. 2. People should be thankful ______ the opportunities given to them in life. 3. Much of the crime in this area is related ______ drug abuse. 4. Her sudden resignation took us all ______ surprise. 5. Many hair problems result ______ what you eat.