(单选题)
—How long do you expect it ______ before the African can keep the disease under control?
—As soon as possible.
A.is
B.has been
C.will be
D.will have been
参考答案:C
参考解析:
考查动词的时态。句意:“你希望非洲多久控制住疾病?”“越快越好”。根据句意,可知事情尚未发生,应使用一般将来时,it will be +一段时间+before意为“还要……才能……”,故选C。
知识点:
