We can’t live ______ water. [ ]

Among the subjects we study at school, I think English is ____________.

On his way to the airport, it ________ him all of a sudden that he had forgotten her birthday.

When you feel helpless and _______, just remember you are not _____ in the worldbecause your friends are around you, including me.

I like your pet dog very much. But I can’t find _______ in the pet shop. Where did you buy _______?