—Why don’t you take some exercise? Sitting before the computer is bad for your health. ---________, but I have to finish my work on time.
I would rather _____ a little earlier to avoid ________in the rush hour traffic.
He speaks English well indeed, but of course not ______ a native speaker.
It was ____ that he had to ask for help.
Pierre Curie stopped his research and _______ Marie in the search of an unknown material.
The ________ expression on her face suggested she was _______ when she heard the news.