從供選擇的答案中，選出應填入下面敘述中{ }內的最確切的解答，把相應編號寫在答卷的對應欄內。��

　　The growth of switching has { A } a new generation of network management tools that help { B }cope with the challenges, { C }them to correlate device alarm in order to { D }pinpoint root causes, or to monitor service levels without depending on IP subnetting schemes. These new tools have become essential to coping with the primary { E }effect of any treatment that significantly increases network flexibility: added complexity.

　　供選擇的答案

　　A：①create ②creates ③created ④creating

　　B：①technicians ②workers ③salesmen ④professors

　　C：①enjoying ②enabling ③engaging ④enriching

　　D：①better ②well ③welly ④goods

　　E：①back ②side ③front ④lateral

　　【解析】

　　本題是關于網絡管理技術的，難度大一些。

　　A處主要考語法，完成時動詞形式。

　　B處考詞義，只有"technicians"(技術員)最合適。

　　C處從語義和語法上看應是"enabling"，意思是“使……能”。

　　D處副詞修飾動詞不定式，而且隱含比較級，只有"better"合適。

　　E處是“副作用”的意思，顯然用"side"。side作形容詞，表示"旁邊的、側面的、副的、枝的"，side effect則指副作用。