time 1 Circle the correct options. 1 Many people over 50 have joined / has joined social media sites in the last few years. 2 My brother is posted / has posted all his holiday photos online. I've uploaded/'m uploaded my best three. 3 My grandfather has a mobile phone but he hasn't sent/ hasn't send a text message. 4 You haven't to answer / haven't answered any of my emails. Why not? 5 My best friend has started / have started a blog about blogging L. ​