Studying in groups is necessary_____ you want to do well in school.
| A．if | B．until | C．unless | D．though |
Large quantities of oilin a place near my hometown recently.
| A．has discovered | B．have discovered |
| C．has been discovered | D．have been discovered |
They were surrounded 
by the enemy, but they ________at last from the village.
| A．managed escaping | B．tried to escape |
| C．managed to escape | D．tried escaping |
—How do you find Qingdao, Mary?
—It’s a beautiful seaside city. I have ________it for my next holiday.
| A．decided on | B．tried on | C．taken on | D．carried on |
David felt ________of the foolish thing he had done in the classroom.
| A．shameful | B．ashamed | C．shamed | D．shaming |
Was it in the village ______ we used to live in _________ the accident happened?
| A．that; where | B．which; that | C．where; that | D．which; where |