In this passage, the author___________.
A.discusses three different opinions B.explains an opinion of his own C.revises someone else's opinion D.refutes all the three opinions正确答案A
In this passage, the author___________. 
In this passage, the author___________.
A.discusses three different opinions B.explains an opinion of his own C.revises someone else's opinion D.refutes all the three opinions正确答案A
