Birds__(can,can't)fly high,but they__(can,can't)swim.怎么填
问题描述：
Birds__(can,can't)fly high,but they__(can,can't)swim.怎么填
答
Birds can fly high ,but they can't swim.
鸟儿能翱翔天际（飞的很高），但是它们不能潜游水底。
答
can,can't
答
can；can't
答
1.can 2.can't