Present Perfect Tense

My best friend and I ____(know) each other for over fifteen years.

They _____(leave) London this month.

We____ (not / plan) our holiday yet.

She ____ (not / see) him for a long time.

He ____ (do) it since we left him.

She ____ (work) here for two months.

The children ____ (eat) the whole pudding. I don't know how it tastes.

Last night I ____ (lose) my keys - I had to call my flatmate to let me in.

I ____ (lose) my keys - can you help me look for them?

She ____(play) badminton since she was a child - she's pretty good at it!