【题目】The notice says, “It’s cheaper by 20% if you book the tickets ________.”
A. in allB. in addition toC. in additionD. in advance
在线课程【答案】D
【解析】
考查固定短语。句意：通知上写着“如果你提前订票，会便宜百分之二十。” A. in all共计；B. in addition to除…之外（介词短语，后面要接宾语）；C. in addition 另外；D. in advance提前；根据句意可知D项正确。