--- Do you take sugar in your tea?
--- I used to, but now I’m on diet. I’m trying to lose weight.
A. the; the
B. 不填; a
C. 不填; 不填
D. the; a
网友回答
A. the; the
(答案→)B. 不填; a
C. 不填; 不填
D. the; a
解析：物质名词前一般不用冠词；be/go on a diet为固定短语，意为“控制饮食，节食”。Do you take sugar in your tea?你喝茶加糖吗？