Complete with the correct form of the verbs in brackets:
1. I opened the door quietly because I knew the she...... (sleep)
2. I.....(drink) several cups of coffee since I got up and I am still half sleep.
3. Look at that wall! It's leaning out,it ...... (fall) one of these days.
4.How long.... (you know) eachother?
5.She ....(already do) the laundry when her mother arrived home.
6. I ....(be) to London several times.