Mr. Wang told us that he would devote all the time he could spend _______ his oral English before g...
2022-11-29 04:54:13 19次 2013-2014学年山东省菏泽市高三3月模拟考试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Mr. Wang told us that he would devote all the
time he could spend _______ his oral English before going abroad.
A.
improve B.
to improve C.
improving D.
to improving
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