The train was very c_ _ _ _ _ _. (a lot of people)
The old man knew very well that the young man had told a l_ _. (words which are not tue)
The young man s_ _ _ _ _ _ that the bag belonged to him. (cried out)
The old man taught the young man a l_ _ _ _ _ . (showing him what should not be done)
幫幫忙呀...