It long we know the result of the experiment.A. will not be beforeB. is afterC. will n

问题补充：

It long we know the result of the experiment.

A. will not be, before

B. is, after

C. will not be, until

D. is, before

答案：

(答案→)A. will not be, before

B. is, after

C. will not be, until

D. is, before

解析：before表示在···之前，本题使用一般将来时，故选答案为A。