15．This is actually a veryentertaining（entertain） book telling people serious health messages．

分析 這確實是一本告訴人們嚴重的健康信息的有趣的書．

解答 答案是entertaining．本題考查語境中選用所給詞的恰當形式；entertain vt．娛樂；entertaining adj．有趣的，娛樂的； a entertaining book一本有趣的書；故答案是entertaining．

點評 本題是要求用所給動詞的適當形式填空，解題時首先考慮句中需要的是謂語動詞還是非謂語動詞；其次，如果是謂語動詞關(guān)注時態(tài)、語態(tài)和數(shù)的變化；如果是非謂語動詞要聯(lián)系非謂語的基本用法判斷非謂語的形式．

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