China recently tightened its waters controls near the Huangyan Island to prevent Chinese fishing boats from ________ in the South China Sea.
| A．attacking | B．having attacked |
| C．being attacked | D．having been attacked |
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China recently tightened its waters controls near the Huangyan Island to prevent Chinese fishing boats from ________ in the South China Sea.
| A．attacking | B．having attacked |
| C．being attacked | D．having been attacked |
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