There is no doubt______ one day the medicine for AIDS will be made.
--Since you have enough time, why not try going by boat for a change? ---_____________________.
____she toured Jiu Zhaigou, He was deeply impressed with its beautiful scenery.
Great attention must be devoted ________ agriculture(农业), especially in China, ______ population is the largest in the world.
Though his parents agreed_____ his views, they didn’t_______ him to go there alone.
_____________ that he did quite well in the exam.