请问老师,因为imagine 的用法之一是接动名词或动名词复合结构,即 imagine doing 或 imagine sb. doing,那么2020年山东卷的这道题中:
As well as looking at exhibits, visitors can play with computer simulations and imagine ____ (they) living at a different time in history or walking through a rainforest.
句中,空上除了可以填themselves,还可以填their吗?