I am anxious_______the result of my exam while my younger brother is anxious_____prize of the exam[ ]

Some researches have proved that water quality ____ due to too many dams and pumps in some areas.

In front of the classroom building ___________ two tall trees.

You will have a better chance _____ passing your exams if you work harder.

May I go to play footballwith Mike now, Dad ——No, you can’t go out ______ your homework is being done.