My mother often took me to visit my grandpa when he was alive.
A.我爷爷还健康时，我妈妈常带我去看他。
B.我爷爷还活着时，我妈妈常带我去参观他。
C.我爷爷还在世时，我妈妈常带我去看他
正确答案是C
My mother often took me to visit my grandpa when he was alive.
A.我爷爷还健康时，我妈妈常带我去看他。
B.我爷爷还活着时，我妈妈常带我去参观他。
C.我爷爷还在世时，我妈妈常带我去看他
正确答案是C