When _______ America and Britain, this famous writer said that the same language _____ the two people.
---- How did it __________ that you made such a silly mistake?---- I myself haven’t figured it out yet.
The water in the river isn’t fit to drink, for you know, it __________.
I hear Mr. Smith was writing a story last year and he still__________.
I haven’t seen _________ Maggie since I came here.
He is rather difficult to make friends with, but his friendship, ________, is more true than any other.