Раскройте скобки, употребляя глаголы в одном из след.времен: Past Simple? Present Simple,...

Question

Раскройте скобки, употребляя глаголы в одном из след.времен: Past Simple? Present Simple, Present Continuous или Past Continuous
4. Who (to speak) there? - I (not to know).
5. He (not to smoke). He (not to smoke) now. When he (to be) at the office yesterday, he (not to smoke), he (to work) hard.

Answer 1

4. Who is speaking there? — I don't know.
5. He doesn't smoke. He is not smoking now. When he was at the office yesterday, he didn't smoke, he was working hard.

Answer 2

Who is speaking there? I dont know
He doesnt smoke.He is smoking now.When he was at the office yesterday,he didnt smoke,he was working hard.