问题描述：
Why didn't you join us to the party last Saturday night?
----I ______,but an unexpected visitor came at the lastminute.
A.planned B.would plan C.have planned D.had planned
请问如何判定 I.这句是 从句呢?为什么是D
----I ______,but an unexpected visitor came at the lastminute.
A.planned B.would plan C.have planned D.had planned
请问如何判定 I.这句是 从句呢?为什么是D
问题解答：
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