8．I soon found that the work I was doing had already been done by someone else，______，I was wasting my time．（　　）
A．to make things worseB．for another thing
C．at the same timeD．in other words

分析 我很快發(fā)現(xiàn)我正在做的工作是別人已經(jīng)做過了的，換句話說，我浪費了我的時間．

解答 答案：D 
to make things worse更糟糕的是；for another thing另一方面，其次；at the same time同時；in other words換句話說，也就是說．句意表達(dá)的是同義解釋，故選D．

點評 插入語在英語中屬于獨立成分，它起著對一句話進行附加解釋或說明的作用．它們中絕大部分可位于句首、句中或句末，并用逗號與其它成分隔開．

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