Zev and John Were Neighbours

True/False

Zev and John were neighbours.Before Zev left on a holiday,he asked John to "keep an eye on his house." While Zev was on holidays,John noticed that Zev's lawn was in need of cutting,and proceeded to cut the lawn.On Zev's return from his holiday,John demanded $10 for cutting the lawn.
-John would not be entitled to claim anything for his service because his act was gratuitous.