Поставьте глаголы в правильной форме: 1) christopher robin (to laugh) and (to go) home for his umbrella. 2) while christopher robin (to walk) up and down, winnie-the-pooh (to sing) a song. 3) some of bees (to leave) their nests and (to fly) around the cloud. 4) christopher robin (to aim) carefully and (to fire).

1) Christopher Robin is laughing and going to home for his umbrella.
2) While Christopher Robin is walking up and down, Winnie-the-Pooh is singing a song.
3) Some of bees left their nests and fly around the cloud.
4) Christopher Robin is aiming carefully and (to fire).
Последнее предложение мне не очень понятно, and там точно нужно? Кристофер Робин старается аккуратно поджечь (set fire)? Если бы было так, and здесь лишний.