问题
选择题
I’ve already told you that the fourth and last part of the article ______ the most difficult to understand.
A．is
B．was
C．are
D．were
答案
答案：A
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I’ve already told you that the fourth and last part of the article ______ the most difficult to understand.
A．is
B．was
C．are
D．were
答案：A