短文填词,用括号类所给单词的适当形式填空（10分）

短文填词,用括号类所给单词的适当形式填空（10分）
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Once a man wanted to go 81 one side of a river to 82 in a boat.He 83 take a sheep(羊),a wolf （狼）and a basket of vegetables 84 him.But he could take only one of them 85 ,because the boat was very 86 .“If I 87 the wolf and the sheep together,the wolf may eat the sheep,” he said to 88 .“If I leave the sheep and the vegetables together,the sheep may eat the vegetables.” He thought and thought.At last,he had an idea.And he 89 get to the other side of the river with the sheep,the wolf,and the vegetables.Do you know 90