问题
单项选择题
He is over fifty, but he looks as if he（）only in his thirties.
A.is
B.were
C.will be
D.has been
答案
参考答案：B
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He is over fifty, but he looks as if he（）only in his thirties.
A.is
B.were
C.will be
D.has been
参考答案：B