题目

It is only by practising English for several hours every day _________ be able to use it freely. A．will you    B．may you   C．that you will     D．when you must 答案：C小马虎在计算减法时，把被减数十位上的6错看成8，把减数个位的2错看成5，结果得到243，这题的正确答案是226226．