91-10-8

consonant

If ...not

条件关系，不是因果关系

karen125

--- are not leached out of soil, reclamation procedures are needed to restore the land’s productivity.

(A) For concentrations of salt

(B) Salt concentrations that

(C) If salt concentrations

(D) With concentrations of salt

答案：C

请问A为什么不对？谢谢。