一道SAT句子提升Economics is (when you study) the production,distribution,and consumption of goods and services.A.B.your studying ofC.doing a studing onD.the study of

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一道SAT句子提升Economics is (when you study) the production,distribution,and consumption of goods and services.A.B.your studying ofC.doing a studing onD.the study of
一道SAT句子提升
Economics is (when you study) the production,distribution,and consumption of goods and services.
A.
B.your studying of
C.doing a studing on
D.the study of

一道SAT句子提升Economics is (when you study) the production,distribution,and consumption of goods and services.A.B.your studying ofC.doing a studing onD.the study of
答案是D
THE STUDY OF - - -- -
----- 对 -- - - 的研究

D
PS.E项呢？IS题难道不是五个选项？= =

Lz
i didn't understand,please make the question clear..

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