1 . Only when the project was completed _________ he able to get back home. (用适当的词填空)

2 . Eating too much roast food may make us ________ ________ (遭受) heat inside our bodies, according to traditional Chinese medicine. （根据汉语提示完成句子）

3 . My father urged that I should study hard ________ ________ (而不是) sit around doing nothing.（根据汉语提示完成句子）