3个英语问题1,Did you hear the dog( bark) loudly just now 为什么是bark

the dog that did not bark, did you hear her ______(sing) loudly just now? Why does the dog bark The dog b____to bark.填空 bark Teach the dog how to bark The dog _____(hear)______(bark)in that room every day. Did you hear just now? bark是名词那barking 呢?we can hear betty"s dogs barking .为什么是 bar The sudden noise started the dog ______ barking bark barked Did you hear a noise just now. One dog barks at something,the rest bark at him