摘要： I don’t know whether it tomorrow.

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I don't know_________it will rain or not tomorrow.

A. how
B. whether
C.when
D. that

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I don’t know he will win tomorrow. I never doubt it will rain tomorrow.

C．whether, whether

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I don’t know he will win tomorrow. I never doubt it will rain tomorrow.

A．if, if B．if, that C．whether, whether D．that, if

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I don’t know he will win tomorrow. I never doubt it will rain tomorrow.

C．whether, whether

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I don’t know he will win tomorrow. I never doubt it will rain tomorrow.

A.
if, if
B.
if, that
C.
whether, whether
D.
that, if

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