问题补充：
Can you me ten dollars? Ill pay it to you tomorrow.
A. borrow; off
B. lend; off
C. borrow; back
D. lend; back
答案：
A. borrow; off
B. lend; off
C. borrow; back
(答案→)D. lend; back
解析：pay sb. money back = pay money back to sb. 表示“还某人的钱”或“偿付（借款）”。pay sb. off表示“付清工资解雇某人”和“偿清（欠款）”。
