题文
, this kind of disease can do great harm to people there．
| A．Occurring where | B．It occurs where it is |
| C．Where does it occur | D．Where it occurs |
推荐试卷
, this kind of disease can do great harm to people there．
| A．Occurring where | B．It occurs where it is |
| C．Where does it occur | D．Where it occurs |
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