The first decade of the 21st century _____the breathtaking and non-stop development of China.

________all the stars， the sun is __________to the earth.

____ do you study for a math test —Istudy math ____ lots of exercises.

Read the poem more slowly,with a slight __________ at the end of each line.

He Zhenliang, the father of China’s Olympic bid, died ____ the afternoon _____January 4, 2015.