at the age of 7 =
问题描述：
at the age of 7 =
RT at the age of...的近义词组?
You can find the students ____ 14,15,16 or 17 are all in the same group.
A.in B.of C.to D.with
答
...谁说的?没有 in +年龄的
B. of
相当于 at the age of,但是省略3个词