Past Perfect Continuous signal words

Past Perfect Continuous: Fill in the signal words.

She had been carrying the boxes for half an hour. for half an hour
Jane had been phoning for hours.
Had the kids been watching TV all morning?
The students had been doing sports since 10 o'clock.
The fans hadn´t been shouting all day.
I had been trying to call you all morning.
The shop had been selling bread for years.
We hadn´t been making the pizzas for weeks.
Anne had been waiting in front of the cinema since 2 o'clock.
Had the kids been chatting with friends the whole day?