The teacher required that all the assignments _____finished before this week...

The teacher required that all the assignments _____finished before this weekend.
A. would be
B. were
C. be
D. are to
      满分：2  分
2.  I think it unnecessary to go back there, _____we have visited these places.
A. so that
B. in order to
C. provided that
D. now that
      满分：2  分
3.  Figure      how to solve the problem.
A. in
B. off
C. away
D. out
      满分：2  分
4.  
I ______ my classmates while they often fight.
A. got on well with
B. gets on with
C. get on well
D. get on well with
      满分：2  分
5.  __your system so the software(软件) will always keep new.
A. Update
B. Change
C. Delete