He started phoning his friends as soon as he finished his work. A. Only when he phoned his friends did he finish his work. B. Hardly had he started phoning his friends when he finished his wo

Only when he phoned his friends did he finish his work.

Hardly had he started phoning his friends when he finished his work.

No sooner had he finished his work than he started phoning his friends.

Before he finished his work,he had started phoning his friends.