问题补充：
The boy a blue jacket can sing songs English.
A. with, in
B. in, with
C. in, in
D. with, with
答案：
A. with, in
B. in, with
(答案→)C. in, in
D. with, with
解析：“in +衣服”为固定搭配，常做后置定语，意为“穿着…衣服的…”，“in English”也为固定搭配，sing songs in English ,意为“用英语唱歌或唱英文歌”。句意：那个穿着蓝色夹克衫的男孩会唱英文歌。结合句意，故选C.
