I have many friends, _______ some are businessmen.

Is there_______ post office near here- Sorry, _______ nearest one is 5 kilometres away.

We should try _______ best to learn English well.

The project ________ by the end of 2012,will expand the city’s telephone network to cover2,000,000 users.[ ]

We should protect the earth because it’s home to ___ _ animals.