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

When the teacher came in, the students ________.

[　　]

A．stopped to talk

B．stopped to talking

C．stopped

D．stopped talking

When the teacher came in, the students ________.

[　　]

A．stopped to talk

B．stopped to talking

C．stopped

D．stopped talking