carrots__(be)healthy food,but hamburgers and french fries___(not be)healthy food.填空,

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carrots__(be)healthyfood,buthamburgersandfrenchfries___(notbe)healthyfood.填空,carrots__(be)healthyfoo

carrots__(be)healthy food,but hamburgers and french fries___(not be)healthy food.填空,
carrots__(be)healthy food,but hamburgers and french fries___(not be)healthy food.填空,

carrots__(be)healthy food,but hamburgers and french fries___(not be)healthy food.填空,
is
aren't
胡萝卜做整体看待,单数
后面是1+1的概念,是复数

are
are not
胡萝卜是健康食品,而汉堡和炸薯条则不是

are;aren't

are aren't