Как правильно: I ...... (not/meet) Sarah and Ann. What time ........ (you/take) the dog for a walk this morning? My parents

1) I haven\'t met (Present Perfect) Sarah and Ann. 2) What time are you taking (Present Progressive) the dog for a walk this morning? 3) My parents rarely left Past Simple) us home alone when we were young. 4) Sandra was watering (Past Progressive) the flowers while Ian was cleaning out the garage.