The passage is based on the author's _______.
A.experience of the changes
B.admiration of the changes
C.analysis of the changes
D.hope for changes
Affixation changes the grammatical class of the word.()
The passage is based on the author's ______.
A.experience of the changes
B.admiration of the changes
C.hope for changes
D.analysis of the changes
In the last paragraph,the author mainly intends to
A.list the necessary changes we ought to make
B.advise US to make any necessary changes
C.explain what changes can bring
D. explain the process of making changes
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