👤
Answered

In the 1920s _ pet owners and dog trainers used vocal commands to train dogs. _ Carl Spitz used hand signals to drain dogs. Choices 1st blank: both, first, then 2nd blank: also, second, however

Answer :

1. Then because it is in the past
2. However because he is training the dogs differently then others used to
MQPPKWMZNTIN
1. Afterwords, it became the past

In Trainings: Other Questions