Some insects______the colour of their surroundings to protect themselves.
【正确答案】 C
【答案解析】解析:take in“收留;包括;理解;欺骗”;take off“脱下;起飞”;take on“聘用;呈现;承担”;take out“拿出;取出;拔掉”。根据句意可知,C项正确。