1) When I saw John in his room, he was busy _________ (prepare) his lessons. 2) I’d like to take this opportunity _________ (thank) all of you for coming to join us tonight. 3) My transistor radio isn’t working. It needs __________ (repair). 4) They found it impossible ________ (get) everything ready in time. 5) I am used to _________ (study) with Mr. Jones and therefore prefer not to change to another teacher. 6) All the women in the office objected to ________ (treat) like this. 7) I must go now. I can’t risk __________ (miss) the last train. 8) The President’s attempts __________ (reduce) inflation were quite successful. 9) He is always the last one __________ (leave) the office. 10) It’s no use __________ (worry) about your child. He’s grown up.