Today isn’t Sunday, so the pupils can’t go swimming. 20/21Today isn’t Sunday, so the pupils can’t go swimming. If today were Sunday, the pupils could go swimming. If today is Sunday, the pupils could go swimming. The pupils could go swimming unless today is Sunday. The pupils could not go swimming if today isn’t Sunday. Giải thíchĐáp án đúng: A Dịch: Nếu hôm nay là chủ nhật, học sinh có thể đi bơi.