選材規(guī)范、標準演練；循序漸進、梯度提升；題量豐富、有效提高；技巧同步、一語中的；縮略速記，全面覆蓋。 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>填橫線處的短句，一行一個短句。