My mother and father like to go a walk.[ ]
A. with
B. for
C. on
答案：B
对甲状腺功能亢进有诊断价值的基础代谢率值至少为（）
A.-10%以上
B.+10%以上
C.+20%以上
D.+30%以上
E.+60%以上
— My dog's really fat.
— You ________ have given her so much food. [ ]
A. wouldn't
B. can't
C. shouldn't
D. mustn't
