精选英语四级练习题

Questions 1 to 5 are based on the following passage.

1. What the author discussed in the previous section is most probably about ____.

A) relationships between causes and results

B) classification of reasoning

C) some other common types of reasoning

D) some special type of reasoning

2. According to the passage, to do the effect to effect reasoning is to reason ____.

A) from cause to effect

B) from effect to cause

C) from effect to effect and on to cause

D) from effect to cause and on to another effect

3. A necessary cause is ____.

A) one without which it is impossible for the effect to occur

B) one of the causes that can produce the effect

C) one that is enough to make the effect occur

D) none of them

4. Your refrigerator is not working and you have found that the electric power has been cut off.

The power failure is a ____.

A) necessary cause B) sufficient cause

C) contributory cause D) none of them