1. He ...... (get) his first bike when he was six, and since then he ....... (take) part in numerous competitions, including the 2012 London Olympics where he .......(win) a silver medal. Although Sam is Australian, he .......(not live) in the country of his birth since he ......(leave) for the USA at the age of sixteen. During his first years in California, he ......(not have) any money, but since then, his prize money ........ (make) him wealthy. Alise, who Sam .......... (know) for several years, is also a BMX champion.