________ a lot of trees in this area, but now we can see a tall building instead.
| A．There used to have | B．There used to be |
| C．There is used to having | D．There is used to being |
________ a lot of trees in this area, but now we can see a tall building instead.
| A．There used to have | B．There used to be |
| C．There is used to having | D．There is used to being |
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