1.Every minute should be made full use----study as we are st

1.Every minute should be made full use----study as we are students.
A.of to B.to C.of D.to of
2.His mother----going shopping on Sundays.
A.makes it a rule B.makes it as a rule
C.by the rule D.as the rule
3.The boy wanted to say something for himself,the teacher,------wanted no excuse.
A.instead B.yet C.however D.but
4.I wonder whether he-----the work by the end of this week.
A.will have finished B.finishes
C.has finished D.finished
5.Every possible means-----to prevent the air pollution ,but the sky is still noe clear.
A.is used B.are used C.has been used D.have been used