---There must be a dozen pens in this house but I can never find one when I need one.
--- Keep looking. ______ is sure to turn up.

---Is your school life like ______ of other teens?
---In many ways, yes.

The most important thing for Lucy is to find a proper job，________ that she likes.

I would appreciate ______ very much if you could give me some suggestions.

They produced two reports, ______ of which contained any useful suggestions.

Devoted to the rescue of the earthquake victims, the volunteers felt _____ but regret.

Sarah hopes to become a friend of ________ shares her interests.

—Have you got used to the Chinese food, Robert?
—Yes, but I don't like ____ when a Chinese host keeps serving me the food I don't like.

As the busiest woman in the village, she made _____ her duty to look after all the other people’s affairs in that village.

One of the first foreign expeditions _______ Mount Qomolangma arrived in Tibet in 1921.