Choose the alternative that best completes the dialogue below. A. ____________ different types of penguins inhabit the South Pole? B. I don?t know. Ten, maybe. A. No, fifteen. And _____________ tall can they grow? B. I have no idea. One meter? A. That?s right. ___________ do they leave the South Pole? B. Probably in winter. A. Excellent. B. _________ are you asking me all these questions? A. Because I want to see if you did your homework!