下列用横线连接的词，全是反义词的一项是（ ）

Hello, this is Amy. Is Tom there—___________________

Why was she unhappy yesterday ?— A call from home ______ an attack of homesickness.

Have you been to the Great Wall? —Perhaps not in my memory ________, it might have been during my early childhood

If there __________ no buying and selling of animals , there __________ no killing .