．(2013·江西九江高三二模)________ around the university, we then were taken to a building, where many scientists worked.
| A．Showing | B．Having been shown |
| C．Being shown | D．Having shown |
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．(2013·江西九江高三二模)________ around the university, we then were taken to a building, where many scientists worked.
| A．Showing | B．Having been shown |
| C．Being shown | D．Having shown |
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