At first the speaker was referring to
公共英语
已帮助 人
At first, the speaker was referring to the problem of pollution in the country, but halfway in her speech, she suddenly _________ to another subject.
A) committed B) switched
C) favored D) transmitted
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选A,让我高兴的是。。。
tomydisappointment:让我失望的是。。。
inaword总而言之
inotherwords换句话说
根据句义,开始时解不出题,后来在别人的帮助下解出,应该是让人高兴的事。
