Past continuous:walk,not talk,look,climb,not wear,not use;

1. I was walking

2. they weren't talking

3. They were looking

4. he was climbing

5. He wasn't wearing

6. he wasn't using

1 - was walking

2 - weren't talking

3 - were looking

4 - was climbing

5 - wasn't wearing

6 - wasn't using

P.S. Как я поняла, нужно просто поставить глаголы в форму past continuous. Если же надо было выбрать, что поставить между другими временами, пишите в комментарии, исправлю.