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17．The little boyis eating（eat）a big apple now．

分析 小男孩現在正在吃一個大蘋果．

解答 答案：is eating 考查單詞填空．根據句中now，要用現在進行時態(tài)，因主語The little boy是單數，且動詞用is．

點評 考查單詞填空，準確地理解題意、然后根據題意及提示確定所填單詞詞形，正確寫出單詞完成答題．

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