The present situation is very complex, so I think it will take me some time to ________ its reality.
A.make upB.figure outC.look throughD.put off在线课程B
考查动词短语。根据“The present situation is very complex”可知下文是说“要算出真正的东西要花点时间”故选figure out，表示“计算，算出”。make up“构造，编造”，look through“浏览，仔细检查”，put off“推迟”。