Write the correct form and tense of th...

Câu hỏi: Write the correct form and tense of the verb in each of the parentheses (0,5 pt).       It ……….. (45. once, believe) that being overweight was healthy, but nowadays few people accept this viewpoint. While many people ………. (46. fight ) the battle to reduce weight, studies are being conducted concerning the appetite and how it is controlled by both emotional and biochemical factors. Some of the conclusion of these studies may give insight into how to deal with weight problems. For examples, when ………... (47. ask ) about their eating habits in times of stress, several hundred people said they reacted to stressful situations by eating. Further investigations with both human and animals indicated that it ………… (48. be, not ) food that believes tension but rather the act of chewing. 

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