Как раскрыть скобки she famous sights(see)

Если в past simple, то saw

1) they went to the theatre last week. 2) my cousin has been to the theatre three times this week. 3) his niece has just written the invitation letters. 4) helen came home, had a short rest, and then began to help her mother. 5) did your relatives take part in the demonstration yesterday? 6) have your parents told you about the project today?

1) he usually visits his grandmother  every saturday  (not is)

2)  what time does she  work ?  

3) how often  do you  use your car ?