问题描述:
All of the preparations for the lask ------been completed and we're ready to start.
All of the preparations for the task ------been completed and we're ready to start.
A.have B.has C.had 理由,应选什么,选B,好不好,为什么
All of the preparations for the task ------been completed and we're ready to start.
A.have B.has C.had 理由,应选什么,选B,好不好,为什么
问题解答:
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