—________under the desk? －No, they aren’t.

A. Where are   B. What’s      C. Are those rulers   D. Is that ruler

There ________ a ruler and two pens on the desk/

         A. are                B. is                 C. be             D. am

There__________ a ruler and some pencils on the desk.

A. Good morning, Jim.

B. No, I can’t see it.

C. Excuse me, Jim.

D. Oh, yes, it is.

E. Oh, sorry, I don’t  know.

F. You’re welcome

A:     51          Where’s my ruler? Do you know?

B:     52          Is it in your pencile case?

A: No, it isn’t.

B: Is it in your desk?

A:      53          

B: Is it in your math book?

A:     54          It’s in the book. Thank you.

B:     55