单选题 4.  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】 惯用搭配题；catch up(on)意为“赶上(进度)”；clear up意为“天气转晴”；make up意为“化妆，编造，构成”；pick up意为“好转，改善，捡起，获得”等；故答案为A。