Great changes have taken place in that factory. It is no longer ____
_____
it was 20 years ago,_____ it was so poorly equipped.
| A．what ,when | B．that ,which | C．what ,which | D．which ,that |
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Great changes have taken place in that factory. It is no longer _________
it was 20 years ago,_____ it was so poorly equipped.
| A．what ,when | B．that ,which | C．what ,which | D．which ,that |
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