I can never forget the days _____ we worked together and the days _____ we spent together.A. when; which B. which; when C. what; that D when; when
The students competed _____the honor of winning _____each other _____the school sports meet.
The Great Wall is __________ tourist attraction that millions of people pour in every year.
She was scared the yard because she was scared by the big dog at the gate.
Mr. Robert is ________ our teacher. He is also our friend.
Health comes first. We should ______ everyday to _____.