【题目】--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
在线课程【答案】C
【解析】考查时态。上句：你预测非洲人需要多长时间控制住疾病？下句：尽快。固定句式：It will be +一段时间+before ----，多久之后将会---，可知句子用一般将来时态，故选C。