几道改错题！！

standforth

1.Butterflies and moths undergo complete metamorphosis, them changing from caterpillar to adult via one intermediate stage, the pupa.

答案很明显是B,但是如何改呢？

2.Alaska became the forty-ninth state in 1956,and Hawaii became the fiftieth state lately that year.

答案选D，这个我知道。但是改的时候我觉得late或者latterly都可以。

3.It took more than fourteen years to carve the faces of four United States President into the granite cliffs to Mount Rushmore,Southj Dakota.

答案是D，但是如何改呢？？

4.Lowell,Massachusetts,known as the “Spindle City”since 1822 when its first textile mills were built,attracted worldwide attention as textile centre.

答案是D，如何改？？

另外，我想请教一下各位托友，就是concern的用法：

be concerned with/about,在什么情况下用be concerned about?在什么情况下用be concerned with?请赐教！

AChao

１．去掉ＴＨＥＭ

２．改ＬＡＴＥ

３．改ＯＦ

４．ＡＳ　Ａ　ＴＥＸＴＩＬＥ　ＣＥＮＴＥＲ

ＢＥ　ＣＯＮＣＥＲＮＥＤ WITH

尘埃

concern oneself about sth和concern oneself with sth都可以。

但是有be concerned with，似乎没有be concerned about。