题目

阅读下面材料，在空白处填入适当的内容或空号内单词的正确形式。 Many weight loss programs seem attractive to people. But for most people are overweight, the results are so (limit) that they will give up long before achieving any realistic results. It turns out that the programs are practically of no use. You lose weight for a while, only (gain) back more weight when you stop your weight loss program. This is such programs are not natural. Is there a natural weight loss solution? A sure way of achieving natural weight loss is to increase amount of exercise you get ev5. John saw a cat while he was taking photos in the park.(对画线部分提问)  John a cat?