填介词.Anna wants to learn (.) Chinese history.2.What do you often do (.) weekends?

问题描述:

填介词.Anna wants to learn (.) Chinese history.2.What do you often do (.) weekends?
Who do you play sports (.

Anna wants to learn (.about) Chinese history.2.What do you often do (...on..) weekends?
Who do you play sports (with)?