At last, we found ourselves in a pleasant park with trees providing shade and ______ down to eat our picnic lunch.

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问题 At last, we found ourselves in a pleasant park with trees providing shade and ______  down to eat our picnic lunch.

选项 A、having sat
B、sitting
C、to sit
D、sat

答案D

解析 and前后的两个并列成分应该是平行的,即用过去时found and sat。
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