There are ________ students in each class in our school.

A. a set number of B. the number of

C. much D. lot of

The mice saw the cat and ________ at once.

A. ran out B. ran away

C. came out D. came in

The factory is polluting the environment. The government want to ________．

A. knock down it B. knock it down

C. put down it D. put it down

—I still haven't found my pet dog.

—I'm sorry to hear that. You ________ be very sad.

A. can B. should C. will D. must

Please ________ your ideas ________ theirs. Then tell me whose are better.

A. compare; with B. compare; to

C. compare; by D. comparing; with

—Whose skirt is this?

—It ________ the little girl's. I saw her wear it this morning.

A. can B. can't be

C. must be D. mustn't be

Every day I ________ the supermarket on my way home.

A. pass in B. pass by

C. past D. passed by

He ________ a book in the library when the rainstorm came.

A. read B. was reading

C. had read D. is reading

—How do you like the concert given by the group?

—Exciting, ________ one piece of the music wasn't played quite well.

A. though B. because C. so D. and

Ever since then, my aunt ________ the book.

A. keep B. has kept

C. keeping D. keeps