Having _____ no-meat day would be a good way of encouraging _____ low carbon life-style.
| A．a; a | B．a; the | C．the; the | D．the; a |
_____ of them knew about the plan because it was secret.
| A．Some | B．Any | C．No one | D．None |
"How many elephants did you see?" "_____".
| A．None | B．No one | C．Not many ones | D．No many |
I remember _____ word he said that day.
| A．all | B．both | C．each | D．every |
One of the students hasn’t prepared _____ lessons very well.
| A．one’s | B．ones | C．their | D．his |
. His attitude to us is _____ of a comrade.
| A．one | B．it | C．that | D．those |