Контрольные задания > How long had you been trying/had you tried to call Tom before he finally answered the phone?

Вопрос:

How long had you been trying/had you tried to call Tom before he finally answered the phone?

Ответ:

The correct answer is: had you been trying.

Похожие

Alan had a headache because he had played/had been playing computer games all afternoon.
By the time Graham arrived at the train station, the train has already been leaving/had already left.
The children had been putting away/had put away their toys before their mum came back home.