A landing on Mars is within the _____ of current physical theory.

The song Take Me Home, Country Roads has much      to people, for few people can avoid getting caught up in its originally real country music．

Before graduation, we had got a lot of practical _____ by doing a part-time job in the factory and it was really ______ for all of us.

You’d better write down the phone number of that restaurant for future __________.

The children were surprised by the sudden _____ of their teacher.