这个消费者权益保护组织是市场上最重要的监督机构。

This consumer rights organization is the most important ___watchdog in the market.

那只大狗是我们家的看门狗，每当有人靠近就会大声吠叫。

The large dog is our ___watchdog, barking loudly whenever someone approaches.

环保组织正在监督工厂的排放情况。

The environmental group is ___monitoring the factory's emissions.