18．Many kids spent hourschatting （chat） online to their friends．

分析 很多孩子花費數(shù)小時在網(wǎng)上和朋友聊天．

解答 答案是chatting．
本題考查語境中選用所給詞的適當形式．題干中考查短語spend some time （in）doing"花費時間做…"；根據(jù)句意，孩子們花費數(shù)小時"聊天chat"，故答案是chatting．

點評 本題是要求用所給詞的適當形式填空，解題時首先考慮句中需要的詞性；其次，如果是謂語動詞關注時態(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；如果是名詞關注單復數(shù)．

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