Traditionally, women in China are in red clothes on the wedding day, because red is the __________ of happiness and luck.
more and more forests destroyed, some animals are in danger of dying out.
It is believed that diligence(勤奋) along with good luck ______ one’s dream.
—I do believe the scientific explanation that when a tomb is opened, the fresh air disturbs the viruses inside it. What about you? —So do I. If _______ in, the disturbed viruses may cause illness or even death.
Our bodies are strengthened by taking exercise. ______, our minds are developed by learning.
It took several hundred years ______ paper-making spread to western countries.