2. Hold a candle.
3. if you don't advance, you will retreat.
Step by step.
5. Strike while the iron is hot.
6. stick to it.
7. Learn from the past.
8. Make great efforts.
9, forget to eat and sleep.
10, work hard.
1 1, by going up one flight of stairs.
12, the sky is high and the clouds are light.
13, studious.
14, Xianhui.
15, aggressive.