单选题 Malaria is an infectious parasitic disease that can be either acute or chronic and is frequently
【正确答案】 D
【答案解析】[解析] D选项recurrent(复发的)符合题意。A选项repeating(重复的)、B选项terminal(末期的)、C选项debilitating(衰弱)都不正确。本题空格处是说经常复发。因此D选项为正确答案。