单项选择题
Young as he is, David has gained（）rich experience in（）society.
A. the；the B. a；/ C. /；/ D. /；the
单项选择题 （）from endless homework on weekends, the students now find their own activities, such as taking a ride together to watch the sunrise.
单项选择题 —When did it begin to snow —It started（）the night.
单项选择题 We had a really bad time about six months ago but now things are（）
