I saw a bird fly to the north fly ing 是还是 fly

I saw a bird fly to the north fly ing 是还是 fly i saw a bird ____ to the north A fly B flying C flys D flied I want to fly.Just like a bird.Fly on the Jack sees a bird fly,fly可不可以加ing? l saw him fly a kite on the playground just now fly 加不加ing if i were a bird,i would fly to you I am a little Little Bird tries to fly but did not fly high If I were a bird ,I would fly up high to view the city I liv i saw some boys ( )a kites.填fly flying to fly I ___I cuold fly like a bird in the sky one day.填want 还是hope Whenever I saw the bird fly in the sky,I just feel relax in I saw a lot of birds_____in the sky yesterday.(fly)