---May I borrow your book Steve Jobs ?- you return it before Friday.A. If onlyB. Unles

问题补充：

---May I borrow your book Steve Jobs ?

--- you return it before Friday.

A. If only

B. Unless

C. On condition that

D. Now that

答案：

A. If only

B. Unless

(答案→)C. On condition that

D. Now that

解析：考查连词。A但愿；B除非；C条件是；D既然。句意：——我可以向你借《乔布斯》的书吗？——条件是你在周五之前还。故C正确。