Small ______ you are called early bird --- you always catch the first train to work!

— Mum, hurry up. We’ll be late.— I will be through in a minute. Have a little ________.

Giving up my job to go back to full-time education was a big __________, but now I know it was the best decision I ever made. 

It is said that dogs will keep you _________for as long as you want when you are feeling lonely．

I listened to Dr. Johnson’s lecture about biology, but I failed to get its key ____.