silent； sun；secretary；visit； complete

（1）Two　　 are needed by this world﹣famous international company．

（2）The taxi driver found a foreign　　 passport and returned it to him at once．

（3）You can have a bird's﹣eye view of the whole city on a　　 day on the mountain top．

（4）Mr Wu，I can't understand the ancient poem　　．Could you explain it to me？

（5）Though people often say　　 is gold，it's better for students to be active in class．