We’ve invited Mr and Mrs Brown to dinner．But we’ll have to ________ because of the baby’s sickness．
A.took upB.made upC.gave upD.put off在线课程D
根据句子意思，首先排除选A项“开始学，从事，占去”；B项“组成，构成”；而选C项，“放弃”，强调主观意义，不符合句子意思，故应选put off“推迟”。