12. We can’t continue to pretend that the problem of homelessness doesn’t ______ in this city.
—I failed again. I wish I _________ harder.—But you _________.
The headmaster hurried to the concert hall only _________ the speaker
The engineer ______my father works is about 50 years old.
They arrived at a farmhouse, in front of ______sat a small boy.
The pen ______he is writing is mine.