3.Jack was busychatting (chat) with his friends while Tina was collecting information on line.

分析 Jack 在忙于與朋友聊天而Tina在網(wǎng)上收集信息.

解答 答案是chatting.本題考查動詞的適當形式;題干中考查短語be busy doing忙于做…;故答案是chatting.

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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