Question

If she ________ the magazine, she ________.

1. A.
   will lose, must pay for it
2. B.
   has lost, must pay for it
3. C.
   lose, should pay for it
4. D.
   has lost, should pay it for

Answer 1

B
答案选“B”。if引导的条件状语从句，谓语动词应用现在时表示将来，A和C不能选(注意：主语是第三人称单数)。“付款买书”pay for it(the magazine)，for是介词，宾语不能位于其中。