这件毛衣必须手洗。
This sweater has to be washed ___by ___hand.
在我们有洗衣机之前,我母亲过去常常手洗衣服。
My mother used to wash clothes ___by ___hand before we had a washing machine.
这位艺术家手工制作每件雕塑。
The artist creates each sculpture ___by ___hand.