题干
In the market, vegetables are sold by _______ kilogram, I mean, by _______ weight.
A：the; 不填
B：不填; 不填
C：the; the
D：不填；the
答案(点此获取答案解析）
A
A：the; 不填
B：不填; 不填
C：the; the
D：不填；the
