题文
For some parents, the Internet can seem like a jungle, ______ danger for their children．
| A．filled with | B．filling with |
| C．to be filled with | D．having been filled with |
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For some parents, the Internet can seem like a jungle, ______ danger for their children．
| A．filled with | B．filling with |
| C．to be filled with | D．having been filled with |
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