Teachers are not happy when they find in class their students sending ________ to their friends by mobile phone.

1. A.
   letters
2. B.
   messages
3. C.
   notes
4. D.
   informations

Teachers are not happy when they find in class their students sending        to their friends.

A.letters                       B.messages?                C.notes                         D.information

Teachers are not happy when they find in class their students sending __________ to their friends by mobile phone.

A.letters         B.messages            C.notes           D.informations

Teachers are not happy when they find in class their students sending       to their friends.

1. A.
   letters
2. B.
   messages
3. C.
   notes
4. D.
   information

Teachers are not happy when they find in class their students sending ________ to their friends by mobile phone.

[　　]