I’m waiting for the mail. Do you know _____ it will arrive?
Our English teacher loves us very much and he ________.
Mr. Reed made up his mind to devote all he had to _____ some schools for the disabled children.
We are living in an age ______ many things are done on computer.
Is it in this room in _____ the great writer once lived ____ he finished his last works?
Of all ___ reasons for my decision to go abroad, my father’s advice was ___ very important one.