题目内容

(2014·宝鸡三检)By the time the girl comes back to life，scientists probably________a cure for this incurable disease.
A．will have discovered　B．are discovering
C．will be discovering　D．have discovered
A
考查动词的时态。句意为：到这个女孩苏醒过来时，科学家们可能已经找到了治疗这种不治之症的方法。根据句意可知，此处应用将来完成时，故选A。
答案：　A
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