______the doors were closed and that all the lights were off, the boy left the classroom.
| A．Check | B．To check | C．Checked | D．Having checked |
When she woke up, she realized that the things she had dreamt about could not have happened.
| A．possibly | B．likely | C．certainly | D．usually |
It is impossible.
| A．very | B．quite | C．rather | D．fairly |
Don’t leave your work .
| A．done half | B．half done | C．a half done | D．done a have |
--How long will you stay there?
---_____.
| A．Two and half weeks | B．Two and a half week |
| C．Two weeks and a half | D．A half and two week |
Four is of two.
| A．double | B．two | C．the two | D．the double |