The World Health Organization warned that Asian countries __________ attentive to bird flu since Asia ___________ got rid of the disease completely.
| A．should keep; has | B．must remain; has not | C．ought to stay; has been | D．shall be; has not been |
What will we do when all the oil in the world has ?
| A．run out of | B．been given out | C．been used up | D．given off |
She was a person and wouldn’t let anyone or anything stop her.
| A．reliable | B．determined | C．stubborn | D．concerned |
So clearly English that he can always make himself understood.
| A．he speaks | B．he spoke | C．did he speak | D．does he speak |
Some research workers completely all those facts as though they never existed.
| A．refuse | B．miss | C．leave | D．ignore |
some of the beer here— perhaps you will enjoy it.
| A．Try | B．Trying | C．To try | D．Have tried |