I spent three hours_____ this book.
A. finish reading
B. to finish reading
C. 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.
We should eat ____ food and it is good for our ____.
A. healthy; health
B. health; health
C. healthy; healthy
Li Lei works in England . He comes to China__.
A. three time a year
B.three times a year
C. three times year
