質問: 採血の場面で いつもどちらの腕でやってますか?を英語で聞きたいのですが、which arm do you usually take?で通じますか?
回答: arm は take 出来ないので、use を使うと便利です。 which arm do you usually use for blood tests? 「いつも」ではなくて、今回のことをを尋ねるのなら、 which arm would you like to use for this blood test? which arm would you like me to use for this blood test? which arm would you like me to stick a needle in?