单选题 He planned to go to France to ______ his art of painting.

【正确答案】 C
【答案解析】(brush up重新学习,提高)。句意为:他打算到法国去进修绘画艺术。A. cut out剪去,删掉;B.come by得到,获得;D.make up构成,虚构,弥补。