Question

_______ the calculation is right, scientists can never be sure that they have included all variables and modeled them accurately. 

A．Even if

B．As far as

C．If only

D．So long as

Answer 1

A

解析试题分析：考查连词：A. Even if即使，B. As far as据…，就…，C. If only但愿，D. So long as只要，句意为：即使这个计算是正确的，科学家们也永远不能确定他们已经包括了所有的变数情况以及精确地对其进行了模拟。根据句意填A。
考点：考查连词
点评：连词主要看上下文的逻辑关系，连词的辨析没有捷径可走，只能在平时的学习中加强记忆。可以用代入法，将句子翻译清楚再做题。