Ⅳ. 根据汉语提示完成下面的句子（每空一词）。
【小题1】If you want to catch that train, you’d better _______ _______ (出发) for the station immediately.
【小题2】When she _______ _______ _______ (往……外看) the window, she saw her father was still there.
【小题3】I’ll do it, _______ _______ (即使) it takes me all the afternoon.
【小题4】“Please take my seat, grandpa. I’m _______ _______ (下车) at the next stop,” Tom said to the old man.
【小题5】—Where does the Earth’s energy _______ _______ (来自)?—Most of it is from the Sun.