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问题: at the age of可选吗?

4.He finished his school in 1992;he was______
that year.
A.fifteen years of age B.at the age of fifteen
C.fifteen years age D.fifteeen old
答案给的A,选B可以吗为什么?

解答:

4.He finished his school in 1992;he was______
that year.
A.fifteen years of age B.at the age of fifteen
C.fifteen years age D.fifteeen old

说个解释给你参考下吧,fifteen years of age 是最正规的说法,既可以做状语,还可以做表语=fifteen years old.

但at the age of fifteen一般我只见过做状语的。你可以看看楼上列举的例子,全都是做状语的,没有见过有作表语的。