We had a really bad time about six months ago but now things are（）

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.

A. Freed
B. Freeing
C. To free
D. Having freed

单项选择题Thank you for sending us（）fresh vegetables of many kinds. You have done us（）great service.

A. / a
B. the a
C. / /
D. the /

单项选择题______ that Mr. Thomson got such rare fishes

单项选择题It's impossible for a child to do so much work within a short period of time, ______

单项选择题—Will you be able to finish the job this week —______.