Jill, we 'll have __training with the dog
问题描述：
Jill, we 'll have __training with the dog
A six-months B a six-month C six months' D six-month's
答
选 C.six months'
A.错了,因为有连字符,就不能有复数
B.有不定冠词 a,说明中心词是可数的,但training不可数
D.six-month's 既有连字符,又有所有格,不成立.