Hello, Mr. Lee.

I am reviewing your Toefl lectures!

I have few questions to ask for this passage. 

1. Are questions such as 9 and 11 which refers to the whole passage common?

I skimmed read the question and didn't see the part where it said, 'passage', though I got it right.

But next time I want to make sure to read this. 

2. On question 12, you have explained why D can't be the answer. 

You said, ETS makes a question with a 의도.

Then, I thought, when ETS would want to make a sentence which goes on the conclusion, would it give particular cues( So, As a reslut...)?

3. I am attempting to completely 100% understand the passage. But, in order to do so, do I have to understand every sentence in the passage?

I am having a trouble on understanding the latter part of the passage 6, which says, " Since the raising of most crops necessitates the prior removal of the natural vegetation, crop failures leaves extensive tracts of land........".

I can't grasp the relationship between the 'need for the prior removal of the vegetation' and the crop failure. 

4. On question 13, I thought 3 was wrong because of 'cattle', thinking cattle refers to 'cow group'. 

I thought livestock includes cattle therefore, implying 'cattle' would be wrong......

Do you have some tips to avoid this kind of 부분집합, 전체 집합 dilemma? 

Thank You!