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Apples are usually sold by ________ weight and eggs are sometimes sold by ________ dozen.

A. the; the　　　　　　B. /;a               C. /; the　　　　　　　D. the; a

 Apples are usually sold by ________ weight, and eggs are sometimes sold by ________ dozen.

A. the; / B. /; a C. /; the D. the; a

Apples are usually sold by ________ weight and eggs are sometimes sold by ________ dozen.

A. the; the          B. /;a         C. /; the         D. the; a

 Apples are usually sold by______weight and eggs are sometimes sold by _______dozen.

 A.the;the          B./;a       C. /;the       D. the;a

 Apples are usually sold by______ weight, and eggs are sometimes sold by______ dozen.

    A. the; the         B. /; a      C. /; the         D. the; a