根据n多题专家分析，试题“John was seen ____ in by the back door, but nobody saw him ___.A．to come…to leaveB．come… leaveC．to come… leaveD．come…leaving…”主要考查了你对  【现在分词的被动式】，【现在分词】，【不定式的被动式】，【过去分词】  等知识点的理解和应用能力。关于这些知识点的“档案”，你可以点击相应的链接进行查看和学习。

与“John was seen ____ in by the back door, but nobody saw him ___.A．to come…to leaveB．come… leaveC．to come… leaveD．come…leaving”考查相似的试题有：