As my exams are coming next week, I'll take advantage of the weekend to ______ on some reading.
 
【正确答案】 A
【答案解析】 catch up on表示“用额外的时间做某事(以弥补所耽误的时间)”,用在句中符合句意。故答案为A。clear up“天气转晴”;make up“化妆,编造,构成”;pick up“好转,改善,捡起,获得”,均不符合句意。