More praise to yourself,____ you’ll build up confidence throughout the difficult times.
| A．but | B．and | C．or | D．however |
.At this moment the bell rang _______ the end of class.
| A．announce | B．announcing | C．announced | D．to announce |
The child sat in the dentist's chair _______.
| A．tremble | B．trembling | C．trembled | D．to trembled |
Properly _______ with numbers, the books can be easily found.
| A．marked | B．mark | C．to mark | D．marking |
Were you _______ when you saw that wild animal?
| A．fright | B．frightening | C．frightened | D．frighten |
_______ the composition, John handed it to the teacher and went out of the room.
| A．Writing | B．Having written | C．Written | D．Being written |