It is thought that a new system _____ the place of the old one in that company. But things are getting worse and worse.
| A．must have taken | B．will take | C．won’t take | D．had taken |
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It is thought that a new system _____ the place of the old one in that company. But things are getting worse and worse.
| A．must have taken | B．will take | C．won’t take | D．had taken |
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