下列关于北美洲气候的叙述，正确的是（   ）

连线题。

①What colour are they? ____                 A. Let's wait.

②Touch this. Is it hard?____                   B. No, she can't

③Look at the light. It's yellow.____      C. They are black and white.

④Can she play yo-yo? ____                    D. Yes, it is.