1.   As the Helliwell sisters always had the pick of the best jobs, they of course lived there while working in London.

2.   Celia looks just like her sister, except that her sister has shorter hair.

3.   He finishes at the front and brings the machine round to the back lawn where my sister is having her picnic.

4.   His sister invariably had the power to restore him to good humour.

5.   My sister has enough knights strewn across history to re-enact Agincourt.

6.   That sister of yours has an awful lot to answer for.

7.   The sisters had no money for food and medicines, but they received a continuous stream of charitable donations.

8.   My sister just had twins.

9.   His sister already has severe symptoms.