问题
选择题
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
before表示在···之前，本题使用一般将来时，故选答案为A。
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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：A
before表示在···之前，本题使用一般将来时，故选答案为A。