一、单项选择(共15小题;每小题1.0分,满分15分)In ____ 1980s, great changes have taken place in ____ China.
The boy is so naughty that he never his mother.
It was only when I fully understood the poem to appreciate its beauty.
It was really a experience. Afterwards everybody was very .
After the flood, what we did first was to providefor the homeless families.
Carl is studying food science at college and hopes to open up meat processing factory of his own one day.