He sat at the desk, __________ a novel.
At first, the company had 15 notebook computers but only one – third used regularly. Now we have over 60 working all day long.
You are not in good health, I think. You could improve your by running every day.
The conference had been held to discuss the effects of tourism the wildlife in the area.
--- How long are you staying? --- I don’t know. .
The building _______now beside the park was designed by a famous designer.