p; D) a witness
68. Very few people understood his lecture, the subject of which was very _______
A) obscure B) upsetting C) distant D) inferior
69. Although the national government has introduced some new laws on this subject, it is the _______state governments which are responsible for pollution control.
A) precisely B) primarily C) progressively D) preliminarily
70. He would _______ it that his son took a livelier interest in politics.
A) see into B) see through C) see about D) see to
Part IV Error Correction (15 minutes)
By the time of the Civil War , there were many
differences between the North and the South.
For instance, the population of the 71.
North was far greater than of the South. 72.
Twenty - two million people lived in the North;
nine million lived in the South. To the nine million
people in the South, more than three million were 73.
slaves, many of whom would fight for the North.
In addition to have more people, the 74.
North also possessed most of the factories in the
United States. This greatly helped the Southern 75.
army, which could count on adequate supplies of 76.
guns, ammunition(弹药), and clothing during 77.
the Civil War. In the contrast, the South, since it
mainly depended on farming, had many factories.
The Southern leaders hoped to gain war supplies from
European countries. They planned to buy their crops 78.
to England and France ii1 return for guns and
ammunition to fight the war. 79.
Except its industry, the North also had
a larger network of railroads to transport supplies. 80.
The South, which had few railroads, depended on
its waterways
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