—There _____a lot of swans in the area.
—Really ? But it’s hard to see them now.
—Really ? But it’s hard to see them now.
| A．used to have | B．is used to | C．used to be |
更新时间：2019-02-10 11:11:40
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【推荐1】My father is ________ a new novel.
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【推荐2】—What are the people doing in the picture?
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