Usually, leaves trees in autumn.

The company’s profit drop _____ in the last three months of 2009 due to the financial crisis [ ]

Masha, a hostess on a Chinese TV program, could not forget those _______moments when she first arrived in China, _______ about Chinese culture.

ndred percent _______ to your studies, though itcan be lonely and no fun at all, will leave precious marks on your youth.

Yu Min _____ in the physics field for many years. He is called the Father of Hydrogen Bomb (氢弹之父). He in the winner of the award for Supreme Science and Technology of China,