The first few years in the 21st century ______ the rapid rise of China as a world economic power.
26. I called _____ you last night, but you were out.
25. The train leaves at 6:00 p.m., so I have to be at the station ____ 5:40 p.m. at the least.
24. --- How did you go to work yesterday? --- I went to work _____ my friend’s private car.
23. It is said that a bridge is being built _____ the river.
22. We will never forget this historical lesson written _____ blood.