t was late autumn. A hungry fox was walking around
the forest looking for something to eat, but he COULD find nothing.
Then he came up to the lake. "There MUST be some fish", he thought. "If I
CAN catch one I shall BE ABLE to have a good dinner. “He saw a few
fishes but they were swimming too fast. But the Fox COULDN'T swim. “How
CAN I catch them?” he thought and said, “Little fishes!” – “We CAN not
hear you.” – “Come nearer, you HAVE TO come on land and live in peace as
I do. You CAN always find something to eat in the forest and you will
BE ABLE to meet many friends.” – “He MUST be so stupid if he tells us to
come on land,” thought the fishes.
Хотя у Вас в задании нет глагола must. в двух предложениях он будет правильным.