单选题 The project leaders will need to work overtime all this week to ______ up for the time they lost last week.
A. keep
B. give
C. make
D. take

【正确答案】 C
【答案解析】make up for表示“赔偿、弥补”。keep up表示“维持”，give up表示“放弃”，take up表示“占据”。