OG11-57

playirrrr

57. A patient accusing a doctor of malpractice will find it difficult to prove damage if there is a lack of some other doctor to testify about proper medical procedures．

(A)  if there is a lack of some other doctor to testify

(B)  unless there will be another doctor to testify

(C)  without another doctor's testimony

(D)  should there be no testimony from some other doctor

(E)  lacking another doctor to testify

答案C，我想知道B为什么不对？

playirrrr

up! who can help me

phyroc

without比unless there will be简洁

winbie

1.without比unless there will be简洁
2. i think the if cause tense should be present tense

sammi考700

Unless是条件状语从句，条件状语从句用现在时表示将来时，不能用WILL