So far as population is concerned.New York is( )the biggest cities in the world.A about B on C among D farAt times the balance in nature( ),resulting in number of possible unforessen effects.A is disturbing B is disturbed C has disturbed D will disturb去
问题描述：
So far as population is concerned.New York is( )the biggest cities in the world.
A about B on C among D far
At times the balance in nature( ),resulting in number of possible unforessen effects.
A is disturbing B is disturbed C has disturbed D will disturb去
答
C
B
答
C among 表示其中之一。
B is disturbed 用被动。
答
c among=one of
b 用被动语态,只能是b