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

Could you tell me —Certainly.

______ big lanterns! I like them very much!— Yes. They sell well at the Lantern Festival.

He ____ a good idea at the meeting.

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Mom, shall we have dinner now- No, we don’t have dinner _____ your father comes back.