There _______ some forests here ten years ago. But now we ca
| There _______ some forests here ten years ago. But now we can see nothing. |
| [ ] |
| A.used to have B.used to be C.is used to be D.was used to have |
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找数量关系时,可借助_______或_______来分析题意
1年前1个回答
你能帮帮他们吗