Since the London smog in 1952, ________ have been introduced in most cities in the U

A.Roundheads
B.creditor
C.Sinn Fein
D.inner-city areas
E.Omaha
F.steel
G.the Outback
H.Mount Logan
I.The Whigs
J.bishops
K.regi
Since the London smog in 1952, ________ have been introduced in most cities in the U

A.Roundheads
B.creditor
C.Sinn Fein
D.inner-city areas
E.Omaha
F.steel
G.the Outback
H.Mount Logan
I.The Whigs
J.bishops
K.regionalism
L."clean air zones”
【正确答案】:L
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