题目内容
See the flag on top of the building ? That was ___ we did this morning .
A when B. which C. where D. what
D
解析:
D表语从句中缺did的宾语。
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题目内容
See the flag on top of the building ? That was ___ we did this morning .
A when B. which C. where D. what
D
D表语从句中缺did的宾语。