题干
选出与你听到的句子意思最相近的句子（ ）
A：My father asked me to look after my sister at home.
B：My father asked me to take my sister back home.
C：My father asked me to go home together with my sister.
答案(点此获取答案解析）
A
，则 
， 
互为倒数”的逆命题；②4边相等的四边形是正方形的否命题；③“梯形不是平行四边形”的逆否命题；④“若 
则 
”的逆命题，其中真命题是