Complete the sentences. use present perfect. 1)mr johnson (become) a writer . 2) bob and charles (be) to the states many times . 3) you (swim) in the pacific? 4)we (not,do) our lessons. 5)i (not , decorate ) the hall. 6) the girls (jump) high. their results are very good. but they (run) 5 kilometres badly. 7)betty (begin) learning english. 8) polly (ring up) doctor gordon . 9) bros (come) back? -no, he hasn't . he never comes back earlier than six. 10) jane says she (not , see) any of the harry potter films before.