They watch _TV___in the evening.(对划线部分提问）

When do they usually watch TV at home?

对TV提问：What do they watch in the evening?

对watch TV提问：What do they do in the evening?

对They提问：Who watches TV in the evening?

对in the evening提问：When do they watch TV?

对TV提问:what do they watch in the evening?

这样说比较好呗！
What do they like to do for relaxing in their free time ?

what do they do in the evening?