In summer people usually stay up late outside, ______ the cool air.
The little boy is dirty from head to foot because he ___ in the mud all morning.
Her ________ look suggested that she was very _______ with the answer.
-Why didn’t Susan come to see us yesterday as she promised? -______.
This book is well worth _______. Would you like to buy one?
These two words are different _______ each other in spelling while they are similar ______ each other in pronunciation.