高三英语，要详细解答

1。It was _________ creative thinking that I took the course,not to get high marks in examinations.A.developing B.todevelop C.develop D.to have developed2.Sixty-nine miners were trapped when the local mine wasflooded in Henan Province, but luckily, 400 kilogrames of milk________ to them during the rescue.A. got through B. broughtdown C. gaveaway D. gave out3.The influence of automobile extends throughout theeconomy_______ the car is so important to American people.A.then B.as C.so D. which