---Happy New Year, Jimmy! ---____________.
It’s important _______ us __________English well.A. of, learning B. for, to learn C. of, to learn
I spent three hours_____ this book.A. finish readingB. to finish readingC. finishing reading
——What are you doing _______ vacation?A. to B. for C. at
You have a ___ . You should stop eating anything.A. headache B. Backache C. stomachache
——______ do you go camping?——Once a month.A. How long B. How often. C. How many.