根据内容提示完成句子。

1. He offered _________ _____ poor black people on their legal problems.

2. The last thirty years have seen the greatest number of laws stopping our ______ _____ _____,

     until today we have reached _____ ______ ______ we have almost no rights at all.

3. At 3:42 am everything began to shake. It seemed as if the world was ___ ___ ____.

4. Thousands of families were killed and many children were left _______ _____.

5.The army organized teams to dig out those who were trapped and to____ ___ ____.

当地基为( )时，可将地基做成台阶形。

A．易风化岩石

B．不易风化岩石

C．软质岩石

D．整体岩石