be happy about 对什么感到高兴,侧重关于某事的意思啊
其他的侧重都不一样,根据语境选
The foreign guests said that they were verey happy __the great changes which had taken place
The foreign guests said that they were verey happy __the great changes which had taken place
A to B for C about D by
为什么选C
A to B for C about D by
为什么选C
英语人气：684 ℃时间：2019-10-17 01:30:23
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