In ________ early 1990's, as ________ gesture of appreciation, the library was named after the businessman who donated most of the money with which to build it.
The government will take some effective measures to control the heavy smog_____the northern China.
She cared more about her students than her own health. That’s why two years passed _____ she was treated for breast cancer.
The early pioneers had to many hardships to settle on the new land.
He tried to join the army but was _____ because of poor health, which made him depressed.
The course normally attracts 20 students per year, ____ up to half will be from overseas.