19. It is reported that China has created the first man-made sun in the world recently, ______ ?
| A．isn’t it | B．is it | C．hasn’t it | D．has it |
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19. It is reported that China has created the first man-made sun in the world recently, ______ ?
| A．isn’t it | B．is it | C．hasn’t it | D．has it |
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