I haven’t read ____ of the articles carefully, but I find that there is a striking similarity between them. 

---Are the Smiths living in the house alone ?--- Yes, although they have three sons, _____ of them live with their parents.

 Many students are playing sports on the playground.______ are playing soccer; ______are running and jumping.

. Take ___ half and give ____ half to your sister.

--Do you know any Russian? –Yes, but ___.