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Ⅰ.完形填空(建议用时17′) [2016·嘉峪关一中模拟]When you concentrate, you focus on one thing and get other thoughts out of your mind. You concentrate on schoolwork, on sports, or on some music which requires serious 1 effort. The point is that you think of only one 2 at a time, do it and leave it behind you. 3 to concentrate is important. Any adult will tell you they 4 have at least a dozen things on their minds. When they must complete a project by a certain day and hour, they concentrate on it and 5 several people into a work team. This 6 a clear focus on the work—and on getting others to do their 7 . Adults have a(n) 8 life which may include a husband or a wife, children, and all the work of running a household. Supper must be 9 and the broken back staircase must be fixed before someone gets 10 . If a child is sick, he or she must go to the 11 . With all these things on their minds, how do adults 12 the day? They know they cannot fight all their battles at one time, so they concentrate on the most | 
