题目内容
【题目】Susan and Lily ______tomatoes and other vegetables on the farm this time yesterday.
A. pick B. are picking
C. will pick D. were picking
【答案】D
【解析】
试题分析：根据时间状语this time yesterday可知本句描述的是过去某时正在进行的动作，故用过去进行时态，选D。
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题目内容
【题目】Susan and Lily ______tomatoes and other vegetables on the farm this time yesterday.
A. pick B. are picking
C. will pick D. were picking
【答案】D
【解析】
试题分析：根据时间状语this time yesterday可知本句描述的是过去某时正在进行的动作，故用过去进行时态，选D。