Harry Potter lives and studies in a world _________ anything can happen, ______ attracts millions people.
English is a language shared by several diverse cultures, each of __________ uses it somewhat differently.
We are looking __________ for a house in this area.
Theclock __________ ten when he woke up.
Thisis my dear teacher without __________help Icouldn't have passed that difficult exam.
We were playing in the field when we __________ sight of a beautiful bird we had never seen before.