March 5 marks the 50th anniversary of the “learning from Lei Feng Day”, a day_____ in honor of the Chinese soldier Lei Feng.
It was the third time that she ______to this mountain village to see the children.
I can well remember that there was a time _____I played sports with my close friends in junior school.
While _________the topic of music in class, all the students show great interest in it.
Please wait a minute, honey! I _______ my work.
Great changes _________ in many fields since China was open to the whole world.