题目

下列句子中，每句都有一处错误。 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。 1．For several billion year after the “Big Bang”, the earth was still just a cloud of dust. 2．How it was to become was uncertain until between 4.5 and 3.8 billion years ago. 3．The earth became so violently that it was not clear whether the shape would last or not. 4．As a result of this, many scientists believe the earth may b自然界的生物艳丽多姿，形态各异．生物体的形态形态和生活习性生活习性是和它生存的自然环境相适应的．