因为这句有副词作状语,when作状语.所以不能有介词.因为介词后必需有宾语.而when不能作宾语.但Here are some songs for us to listen to这句子例外.因为不定式作定语时.被修饰词要作动词不定式的宾语,如不及物动词后不能加宾语所以要在动词后因一介词. 再如 We can't find a house to live in.
D. arrivearrive at后面要接某个地方