To help the reader understand that small things keep heat in, the writer uses ()

A. How about her
B. What happened
C. I believe he
D. poor Alan
E. I can imagine
F. I guess something
G. Is she fine now
H. I don’t know

A. Do knock before you enter the classroom.
B. Go to your seat and then take out your books.
C. Be ready with your book out to start the class.
D. Make your pencil sharp after class.