. The ________ flight CA9525 for 11:30 a.m. is to be put off because of the stormy weather.
| A．formal | B．regular | C．ordinary | D．common |
Panda is one of remaining endangered animals in the world.
| A．The; The | B．A; a | C．The; a | D．不填；the |
I was told that there were about 50 foreign students ________ Chinese in the school, most ________ were from Germany.
A. studying, of whom B study, of them C. studying, of them D study, of whom
_________ by the teacher, Tom got into the classroom from the back door quietly.
| A．To avoid being seen | B．Avoiding seen | C．Avoid being seen | D．Avoided seeing |
All of the students held the view _________ the teacher advised them to do was reasonable.
| A．that what | B．what that | C．that that | D．whether what |
After the company reformed its rules and regulations, we find the business is really ________.
| A．taking off | B．bringing in | C．knocking off | D．taking up |