Use present simple or present continuous. 1.My mother (know) a lot

Use present simple or present continuous.
1.My mother (know) a lot about History, so today she (help) me with my homework.
2.Right now the boys (have) breakfast.
3.How often (you/visit) your grandfather?
4.I'm sorry. I (not/understand)
5.We (not/need) your help at the moment.
Use present simple or past simple
1. Last week I (visit) my grandparents.
2.We (not to be) at school yesterday.
3.My sister often (read) books in the evening.
4.They (not to do) exercises every morning.
5.I (spend) my summer holidays in the country.