iPhone, that is the new-fangled gadget, is currently the most popular on the market. - which, This smartphone, which I use regularly, is so outdated. I need a new one - correct, Grace Brewster Hopper, whom homeland is the USA, was the first to devise the theory of machine-independent programming languages - whose, Mr Kemp, which is an engineer, is going to create a state-of-the-art compact engine - who, iPhone is a line of smartphones produced by Apple Inc. that use Apple's own iOS mobile operating system. - correct, His brother, that is an absolute geek, is a friend of mine - who, Tesla, which is an American multinational automotive and clean energy company, uses cutting edge technology to create products - correct, Grace, whose I work with, is developing a robotics test bed to experimentally investigate the new technology - who, Jacob Alison, who is just a fifth-grader, has created the most user-friendly application for elderly people - correct,

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