Past perfect continuous

Asem and Diana had been travelling for 2 months__ the time the happy news came.

• in

• for

• by

He____in a flat for 30 years before he moved to a house.

• had living been

• had been living

• had living

Mom was tired yesterday because she ___ the house all day.

• has been cleaning

• had been cleaned

• had been cleaning

My friends were very tired at the end of our long trip. We ___ for 6 hours.

• have been driving

• had been driving

• had driving been

Her friend said that they___at the airport for 10 hours because of the delay of their flight.

• had been staying

• had been staing

• had staing

What_______? She looked so tired.

a) had been she doing

• had been she doing

• had she doing

• had she been doing

They hadn't been talking ___June.

• since

• by

• at

I ____my phone until I called

• had been looking

• had been looking for

• had looking for

My grandfather had been playing chess since his childhood.

• has been played

• had been playing a

• had been playing

Which of these sentences is correct?

• How long you had been waiting before the train arrived? 

• How long had you been waiting before the train arrived?

• Had how long you been waiting before the train arrived?