The study shows that the ________ scenes in movies and TV are harmful ________ children.

It was with great delight that I read in your February _____ the letter to the Editor written by Prof. Johnson.

There is no _____ that the Chinese people will present to the world a successful, splendid  and unforgettable exposition（博览会）.

Shanghai is so full of_______, it seems as if things never stop.

Soon after the mud-rock flow hit Zhouqu, Gansu Province, many soldiers came to the ______ as many people were trapped underground.