20．Generally speaking, it is financially unwise for people quit stable office job and start working from home. It is there are a lot of distractions when people working from home. People working from home tend to procrastinate because there is no discipline. Also, working from home make people isolated. Therefore, it is financially more advantageous for people working in the office.
21．是说W城本来是以旅游业为主，但是因为工业污染，national parks就变得很没有吸引力，所以去参观的人就少了。但是最近发现在一些公园里有很丰富的煤矿，所以只要政府批准mining company去开采的话，利润（很清楚，说的是revenue）就会上升，而且会提供工作给那些之前在干旅游业的人 题库号码：暂无
22．The following appeared in an editorial from a newspaper serving the town of Saluda.
“The Saluda Consolidated High School offers over 200 different courses from which its students can choose. A much smaller private school down the street offers a basic curriculum of only 80 different courses, but it consistently sends a higher proportion of its graduating seniors on to college than Consolidated does. By eliminating at least half of the courses offered there and focusing on a basic curriculum, we could improve student performance at Consolidated and also save many tax dollars.
1. causal oversimplification
2. false analogy
3. It is likely that the smaller private school is incapable of offering more courses, or else its students can have better performance.