There are ________ soccer fans in the world.
A. million B. three millions C. millions of
My family has two dogs.One is white，________ is black.
A. other B. another C. the other
In our school library there ________ a number of books on science，and in these years the number of them ________ growing larger and larger.
A. are；is B. is；are C. has；is
—Look! A book is on the floor.Whose is it?
—It ________ be Rick's.It has his name on it.
A. mustn't B. can't C. must
—Have you seen the movie Monster Hunt ________？
— Yes, I've ________ seen it.It's wonderful.
A. already; yet B. yet; yet C. yet; already
(2017，北京)Lily is my classmate.We ________ each other since she came to our school.
A. know B. knew C. have known
