Questions and exercises are given by the computer, which decides ______ to move the students ahead, review an easier level, ____ give more work on the same level.
| A．either, or | B．both, and . | C．whether, or | D．not only, but also |
She was scared _______ when hearing the sound of explosion.
| A．to death | B．death | C．of death | D．with death |
Most parents are not __________ the danger of their babies’ eating jelly, which causes most unfortunate incidents to happen.
| A．well aware to | B．very aware of | C．aware that | D．well aware of |
Don’t turn the room __________, as I have just tidied it.
A. inside B upside down C. outside D. inside down
Many people _____ the opening ceremony of 2010 World Expo, which was so amazing.
| A．witnessed | B．participated | C．swallowed | D．handled |
This is the very book _____ I need now.
| A．what | B．which | C．that | D．all |