Linda’s school is ______ the south of the city.[ ]

English is ________ useful language so that most people speak it as ________ second language.

The islands developed on their own for 80 million years and ________ have many rare animals found nowhere else.

Our teacher asked us_________ the bus after the trip.

I want to know ________ next week，Mum.—If I know about it, I will tell you at once.