A-A+ He taught himself to play the violin _________ 2022-08-06 08:17:07 问答库 阅读 177 次 问题详情 He taught himself to play the violin __________practising all night．A．byB．with byC．at by D．on 参考答案 正确答案：A介词by常和动名词连用，说明方式、手段等。
