Having lived in China for 8 years, Helen has a good _______ of both English and Chinese.
—Why are so many northern Chinese visiting Southeast Asia countries recently ? —They are trying to get a ___shelter from the cold weather in winter.
The story showed marriage between people of different races ,_____ was against the law at that time.
Getting your students ___ in classroom activities is vitally important.
Several musicians say they consider it the greatest musical composition ____written.
Lewin was interested in taking research beyond books and looking at how it could ____ real social change