1. Even on the most careful prepared trip, problems will sometimes develop. 2. Although rats are destructive and may carry disease, many cities try to exterminate them. 3. Having leisure activities are truly important to the elderly. 4. The rescue team was having great efforts to free people trapped in the flooded homes. 5. There are many benefits that we may be gained by actually taking the time to read books. ANSWER Mistake Correction 0. on myself by myself 1. 2. 3. 4. 5.