1.such修饰名词；so修饰形容词或副词；
2.本句中such修饰名词progress,但允许such和progress之间有形容词,形容词是修饰progress,such不修饰后面的名词；如：He is such a clever boy that his teacher likes him very much.
3.在such.that ...和so ...that.句型中,如果so或such放在句首,要用倒装句,故答案4正确.
4.请注意以下正确句子和不正确句子：
正确句子：He is such a clever boy that his teacher likes him.
Such a clever boy is he that his teacher likes him.
Peter made such rapid progress that his coach couldn't help praising him.
Such rapid progress did he make that his coach couldn't help praising him.
He was so excited that he couldn't get to sleep.
So excited was he that he couldn't get to sleep.
Light travels so fast that we can't imagine its speed.
So fast does light travel that we can't imagine its speed.
不正确的句子：He is so a clever boy that his teacher likes him.
So a clever boy is he that his teacher likes him.
Peter made so rapid progress that his coach couldn't help praising him.
So rapid progress did he make that his coach couldn't help praising him.
So rapid progress did he made that his coach couldn't help praising him.
可记住公式：such+a+adj.+可数名词单数+that.
such+adj.+不可数名词单数/名词复数+that.
so+形容词/副词+that.
so+形容词+（a）+名词+that.