1. This book ________________________ (条理不清),Some parts are even contradictory.
　　2. Unlike photocopies of books, the digital copies are _____________________ (几乎和原件质量一模一样).
　　3. The snow ___________________ (已持续下了几个小时) and the ground is completely covered.
　　4. Fertilizer are used primary to enrich the soil and _______________________ (提高产量).

　　5. American football and baseball are becoming known to the British public through ______________________ (电视传输)from the United States.
　　

　　答案：
　　1. This book does not have an integrated structure (条理不清),Some parts are even contradictory.
　　(本题考查形容词用法。Integrated意思是“整体的，综合的”)

　　2. Unlike photocopies of books, the digital copies are virtually identical in quality to the original (几乎和原件质量一模一样).
　　(本题考查固定短语用语，identical 意思是“同一的，相同的”，后接to或with，be identical to/with sth 表示“和…一模一样”)
　　3. The snow has been steadily falling for hours (已持续下了几个小时) and the ground is completely covered.
　　(本题考查时态和动词用法。此句应用现在完成进行时来表示“某个动作的持续”，动词fall特指“降落”)
　　4. Fertilizer are used primary to enrich the soil and to increase yield (提高产量).
　　(本题考查平行结构，to increase用来与to enrich保持结构上的平行)
　　5. American football and baseball are becoming known to the British public through televised transmissions (电视传输)from the United States.