选材规范、标准演练；循序渐进、梯度提升；题量丰富、有效提高；技巧同步、一语中的；缩略速记，全面覆盖。
The American flag is composed of thirteen parallel red stripes that alternate with white ones. A blue-colored rectangle 1.__________ contains fifty white five-pointed stars. They are arranged in nine parallel rows where the rows containing six stars each, 2.__________. The stars 3.__________ the fifty states of the United States, while the thirteen stripes celebrate the thirteen colonies that 4.__________ the British. The flag is popularly accepted as 5.__________ and the rights promised to the American citizens through the Bill of Rights. It also represents the principles of individual and personal liberty 6.__________. There is no legal definition for the symbolism of the colors used in the American flag. However, it is said that white signifies purity, red stands for bravery and 7.__________.
<注意>填横线处的短句，一行一个短句。
in the upper left quarter of the flag
alternate with rows consisting of five stars
stand for
rebelled against
a symbol of the establishment of the US Government
put forth by the Declaration of Independence
blue for perseverance and justice
美国国旗由十三条红白相间的平行线组成。一个蓝色的矩形框里包括五十科白色的五角星。它们在旗帜上面的四分之一处被平行排列成9行，每行6颗。星星代表美国的五十个州，而十三条平行线表示美国脱离英国殖民统治重建的十三年。这个旗被普遍认为是美国政府建立的标志。它也代表了个人权利以及独立宣言倡导的个人自由和人权宣言赋予美国市民的权利。美国国旗上颜色的象征意义没有法律的定义。然而，据说白色表示纯洁，红色代表勇气，蓝色代表毅力与正义
——译文来自: dgg1230