Pandora______a lecture to her class at nine o’ clock yesterday morning when you called.

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问题 Pandora______a lecture to her class at nine o’ clock yesterday morning when you called.

选项 A、gave
B、has given
C、had given
D、was giving

答案D

解析 句意:昨天早上9点你打电话时,Pandora正在给学生上课。考查过去进行时态,其形式应为“was/were+V—ing”,故选D。
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