Complete the sentences with the correct prepositions. 1).Why should you deprive yourself _____such simple pleasures? It will be bad for your health if you are often______ stress. 2).Animals are _____ their most vulnerable when searching ______food for their young. 3).There are bound______ be changes when the new system is introduced, and the local people are actively looking out ____ them. 4).She felt hot and breathless _____ the exertion of cycling uphill. She especially hoped ___ a spa to relax herself. 5).When it comes _____ customers, it's essential to understand that there may be a wide range of people you could potentially appeal ______.