When the teacher came in, the students stopped ________ with each other.

1. A.
   to talk
2. B.
   talking
3. C.
   talked
4. D.
   talk

When the teacher came in, the students stopped _______ and became very ________.

A. to talk, quiet?????? ????????????? B. talking, quiet????????????? C. to talk, quietly????????????? D. talking, quietly

When the teacher came in, the students______ at once.

A．stopped to talk                         B．stopped talking

C．stoped talking                          D．stoped to talk

When the teacher came in, the students stopped ________ and became very ________．

1. A.
   to talk, quiet
2. B.
   talking, quiet
3. C.
   to talk, quietly
4. D.
   talking, quietly