题目内容
The baby ________ 4 months enjoys smiling at people.
[ ]
A.
in
B.
on
C.
for
D.
at
答案:D
解析:
解析:
在年龄前用介词at. |
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题目内容
The baby ________ 4 months enjoys smiling at people.
in
on
for
at
在年龄前用介词at. |