请根据句意用所给单词的适当形式填空。 小题1:The teacher devoted his lifetime to (teach) his students. 小题2:While (watch) the programme, the children felt excited. 小题3:When we got to the cinema, the film (begin). 小题4:When I was young, my teacher told me that the earth (go) around the sun. 小题5:Titanic is a romantic film (direct) by James Cameron