—Do you like our English teacher? —Yes. I think his class is very ________.

—What about going by plane? —Good idea! I feel really_______ because it’s the first time for me to take a plane! 

 The harder we work, the_____ result we will get.

There are many buses running in the street. Don’t go ______ it.

People who eat a balanced diet should be ________ than those who only eat hamburgers.