选择题 Peter had to work hard day and night _______he could earn more to pay for his new house.
【正确答案】 A
【答案解析】短语辨析。句意:彼得不得不夜以继日地努力工作,以便能挣更多的钱来买新房子。In order that为了,以便；in case that万一,如果；provided that如果,条件是,倘若;On condition that如果。