题文
It’s going to be some time _____ he sees his father again, _____ business has just been started in Switzerland．
| A．after; who | B．before; whose | C．when; whose | D．since; who |
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It’s going to be some time _____ he sees his father again, _____ business has just been started in Switzerland．
| A．after; who | B．before; whose | C．when; whose | D．since; who |
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