In order to attract more customers, many supermarkets usually sell their goods at a good________ at weekends. 

After careful research, it was decided that the spaceship should reenter the Earth’s________.

His_______ was so strong that I couldn’t understand a word he was saying.

It is very important for English teachers to have a knowledge of the theories of language_______. 

Seeing the happy _____ of children playing in the park, I’m full of joy and confidence in the future of our country.