21.肥沃的
Rich Fertile
22.贫瘠的
BarrenInfertile Lean
23.优点
n. AdvantageMerit Virtue Edge Excellence Predominance
adj. SuperiorPositive
24.缺点
n. WeaknessDrawbackShortcomingFlawVulnerability Demerit
adj. Inferior Negative
25.重要
adj. Important Significant Essential Crucial Vital
n. Importance Significance
26.危险
Danger Endanger Dangerous
Hazard Hazardous
Threat Threaten Threatening
JeopardyJeopardize Jeopardous
Risk Risky
27.种类
n. Type Category Classification
v. SortCategorize Classify
以上就是听力中出现频率最高的PP，而其它更多的PP则需要平时打下扎实的语言基础，才能在考试中把它们分辨出来。
