It's OK for him to come.
彼が来るのはかまわない
It's one week to Christmas.
クリスマスまであと１週間だ
It's only (right and) proper that ....
…が正しい，正当である
It's only a few minutes' run.
走っていけばわずか２，３分の所です
It's only a joke.
ただの冗談だ
It's only right that he (should) know the fact.
彼がその事実を知っていて当然だ
It's only right [fair].
どう見ても正しい［公平だ］
It's only so much rubbish.
それはまったくのがらくたに過ぎない
It's only spitting (with rain).
（雨が）ぱらついているだけだ
It's out of the question.
そんなの話にもならない
