--Is this the office ________ your parents are working now?
--No. They are working in the next one.
| A．in which | B．in where |
| C．that | D．which |
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--Is this the office ________ your parents are working now?
--No. They are working in the next one.
| A．in which | B．in where |
| C．that | D．which |
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