Ladies and gentlemen, please remain________until the plane has come to a complete stop.
| A．seated | B．seating | C．to seat | D．seat |
_______, Mary talks a lot about her favorite singers after class.
| A．A quiet student as she may be | B．Quiet student as she may be |
| C．Be a quiet student as she may | D．Quiet as she may be a student |
It ____ to me that we can telephone our teacher and see whether he knows what to do with the situation.
| A．occurs | B．strikes | C．happens | D．takes |
Can you believe his reason for being absent from the class _____ he had to look after his sick mother at home?
A．while B．that C when D．as
Can you imagine the actress ____ so much in public?
| A．admiring | B．admired | C．to be admiring | D．being admired |
- Would you like to share your opinion with us? 
- Ok. Mary is studying harder than before, ____ everyone can see.
| A． | because | B． | which | C． | that | D． | as |