Sample English Test - Continues

6) The wind howling like a wolf on the prowl.

Which is the best way to write the underlined portion of this sentence? If the original is the best way, choose option (1).

^1. howling like a wolf

^2. been howling like a wolf

^3. was howling like a wolf

^4. will be howling as if a wolf were

^5. howling as if a wolf were