Put the verb in the correct form of the Perfect Continuous.

They (to celebrate) their wedding for the whole week already.

I (to play) the guitar for a long time when you phoned me.

I (to sleep) for only 2 hours when the alarm clock rang.

We (to sunbathe) on the beach for several hours by the noon.

Mary (to play) with her doll when her brother gave her a ball.

Tom (to speak) to the customer since lunch time.

Mark (to choose) a new telephone for an hour before he decided not to buy it.

She said she (to look) for us for an hour.

By tonight I (to keep) to a diet for 2 weeks already.

When he came, she (to cook) dinner for half an hour.​