To prevent the air ___ ,something will have to ___.
| A．to pollute…take | B．from being polluted ..be done |
| C．to be polluted…be taken | D．from polluted… be done |
Did the manager agree ___this plan that day?
| A．to | B．on | C．against | D．with |
Tom wrote __good composition that he was praised by all the teachers in the school.
| A．so a | B．such a | C．a so | D．a such |
After singing a song, he __ us a joke.
| A．went on telling | B．went on to tell | C．went telling | D．went to tell |
The great writer and professor____.
| A．is an old man | B．are both old men |
| C．is an old man and a young man | D．were two Chinese |
The League secretary and the monitor____ asked to attend the .meeting this afternoon.
| A．is | B．was | C．are | D．is being |