Past perfect continuous interrogative 4 - tutto inglese - Imparare l'inglese gratis on line

the journalist (cover) the event for long before it ended?
they (enjoy) their meal before the interruption?
he (maintain) regular contact with you?
we (decorate) appropriately for the season?
the scientists (observe) any significant changes?
she (participate) in the training sessions?
they (hike) often before the accident?
I (learn) anything new from this course?
he (wash) the car before it rained?
we (collect) enough data for the research?