B
Test question analysis: This question uses a poem by Mao Zedong to test students’ mastery of the knowledge points of the Red Army’s Long March.
The information that can be received by reading the words is "Chishui is crossing the golden sands, and the snow-capped mountains and grasslands are waiting to fly." It can be seen that the Red Army crossed Chishui four times during the Long March, crossed the Jinsha River skillfully, climbed the snow-capped mountains and crossed the grasslands, etc. According to the meaning of the question, option B is consistent with the question. Meaning, so choose B.