题目内容
After_________walk,they all felt tired.
| A.three hours | B.three-hours |
| C.three hour’s | D.three hours’ |
D?
表时间的名词所有格用’s式,且以s结尾的复数名词所有格只加’,s省去。?
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题目内容
| A.three hours | B.three-hours |
| C.three hour’s | D.three hours’ |