题目内容：

增加：在缺词处加一个漏字符号(Λ)，并在其下面写出该加的词。

删除：把多余的词用斜线(＼)划掉。 修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1．每处错误及其修改均仅限一词；

2．只允许修改10处，多者(从第11处起)不计分。

At 3:42 one of the greatest earthquake of the 20th century shook Tangshan．It seemed as if the world was at the end．A huge crack that was eight kilometers long and thirty meters wider cut across houses, roads and canals．Steam bursts from holes in the ground．Hard hills of rock became rivers of dirt．In fifteen terrible seconds a large city lay in ruin．The suffering of the people was extremely．Two-thirds of them died and injured during the earthquake．The number of people killing or injured reached more than 400,000．After the earthquake, everywhere the survivors looked nearly everything was destroyed．Bricks covered the ground like red autumn leaves and sand was now filled the wells instead of water．People were shocking and they felt hopeless．