题文
【2013天津】—I don’t know _____.
---Because he has to look after his mother.
| A．why he is leaving | B．why is he leaving |
| C．whether he is leaving | D．whether is he leaving |
【2013天津】—I don’t know _____.
---Because he has to look after his mother.
| A．why he is leaving | B．why is he leaving |
| C．whether he is leaving | D．whether is he leaving |
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