[单项选择题] Tariffs may ______ on commodities leaving an area or on merchandise entering an area.
A.levy
B.be levied
C.effect
D.be effected
正确答案:B

[单项选择题] Tariffs may ______ on commodities leaving an area or on merchandise entering an area.
A.levy
B.be levied
C.effect
D.be effected
正确答案:B