In order not to get into trouble, advertisers are increasingly cautious about taking out ads_______children.
| A．being aimed at | B．aimed at |
| C．having aimed at | D．having been aimed at |
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In order not to get into trouble, advertisers are increasingly cautious about taking out ads_______children.
| A．being aimed at | B．aimed at |
| C．having aimed at | D．having been aimed at |
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