This is the first time in their____ to ski on the Apls A.life B.lifes C.lives

问题描述:

This is the first time in their____ to ski on the Apls A.life B.lifes C.lives
解释一下为什么只能选C

原因他们的生命要用复数
life变复数为lives
还有问题可以问我