—You've made great progress in your studies of English, haven't you? —Yes, but much .
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.
Many people can’t learn any lessons from the mistakes they’ve made __________ they get hurt somehow.