填空题 Howard Hughes was futuristic in aviation design.

填空题 They are working on a new ______, which calls for a(n) ______ amount of time and energy.

填空题 After I bought this iPad, I ______ my old computer.

填空题 Jack had a hard time grasping the basic ______ of mathematics.

填空题 It's one thing to learn the rules of politics from books. It is quite another to get into the ______ world of real-life politics.

填空题 The ship, with 1,000 passengers ______, was bound for New York.

填空题 At yesterday's sports meet, my roommate Brian ______ of our school in the men's 100-meter race.

填空题 His plan is to design a new model, into which some ______ of previous models will be ______.

填空题 He regards learning as a daily experience as well as a lifetime ______.