Question

When does his mother do at ten every day怎么回答？

Answer 1

问句的意思是他的妈妈每天十点（经常）做什么？
可以用一般现在时回答疑问
即：举个例子
1.His mother (usually) works at ten every day.
他的妈妈每天十点钟在工作。
2.His mother dances at ten every day.
他的妈妈经常每天十点在跳舞。