（）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 —______.

单项选择题With the shining water before you and the wind, ______ trees behind you, you can not help ______.