问题

_______ 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

正确答案是：

同类题型

She is ________ the newspapers to be thrown away and putting away the rest.[ ]

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Isn’t that book so boring—___________. You can know a lot about wild animals.

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