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    the whole process for the studies of cancer took more than a year, the technology is moving so fast that it will soon take just weeks．
A．HowB．BecauseC．If　　　　　D．While
D

試題分析：句意：雖然研究癌癥的整個過程已經(jīng)耗時近一年多，但是技術發(fā)展如此之快以至于很快就用不了幾周的時間就有進展了。How 怎樣，引導方式狀語從句；Because因為，引導原因狀語從句；If引導條件狀語從句；While 當….時，盡管，引導讓步狀語從句。
考點: 考查連詞的用法。
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