1.Usually
they have lunch at the office. They are having lunch et the office.
2.Sometimes
they have parties in the country. They are having parties in the country.
3.They
often invite their friends to them.They are inviting their friends to them.
4.They
seldom give us their book. They are giving us their book.
5.I
read this newspaper every week. I'm reading this newspaper now.
6.We
buy sandwiches every time there. We are buying sandwiches now .
7.They
usually buy interesting books in London.They are buying interesting book in London.
8.They
have a nice office in Moscow. They are having a nice office in Moscow.
9.We
often invite them to parties. We are inviting them to parties.
10.Every
day they have dinner at home.They are having dinner at home now.