[单项选择题] We are a state-owned corporation ______ the export of tablecloths.
A.specialized
B.specializing
C.specialized in
D.specializing in
正确答案:D

[单项选择题] We are a state-owned corporation ______ the export of tablecloths.
A.specialized
B.specializing
C.specialized in
D.specializing in
正确答案:D