________ of them knows the answer. What can we donow — Let’s ask a third boy for help.

____, Tom. Is this your pen —No, it isn’t. I think it’s ____.

“time is knowledge”, but I never seem to have enough of ____. So I am workinghard to save them.

Only after Helen moved to Australia ______ how important she was to me .

David has been in high spirits these days— ______ He should win the first prize in thecomposition test.