You may use the room as you like ___ you clean it up afterwards.

A. so far as     B. so long as   C. in case   D. even if

_____ we can see, we can’t get very far in this project without her help.

A. As long as            B. So long as             C. So far          D. As far as

____ he does his work, I don’t mind what time he arrives at the office.

    A. So far as    B. So long as    C. As far as         D. So as 

You can go out _____ you promise to be back before 11 o’clock.

　 A. so that 　 B. as far as  C. so long as 　 D. in case

 You may use my office as you like,        you clean it up afterwards.

   A. as if                           B. as well as                        C. as soon as                      D. so long as