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【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

【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。

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