---Have you finished the report?---Oh, sorry. It was so noisy in the office that I couldn't _______ down to write anything.
Martin’s been ill, but ________, I think he’s hoping to come with us tomorrow.
That tree, __________ are almost bare, is a very old one.
The reason ____ she was absent is _____ he was badly ill yesterday.
It suddenly _____ to the detective that the professor was probably murdered by his own wife .
---What made her unhappy? ---_____.