__________, I have never seen a person as warm-hearted and patient as Jack.

下列句子中，没有语病的一句是（ ）

The _____ boy wondered why fish soon went _____ in hot weather. He went to ask his teacher. [ ]

Over 80 percent of the population _____ workers.

Hachik’s (忠犬八公)master__________ it very well.