He is so stubborn that once he makes up his mind , nothing can change it;_______, it’s no use arguing with him.
A cough is usually nothing to worry about unless it lasts for ten days.
We had an anxious couple of weeks _____ for the results of the experiment.
--- Can you show me Mr. Jaffer’s office, please? --- _____. But I don’t know if he is in at the moment.
The manager believes prices will not rise by more than _____ four percent.
Although this ____ sound like a simple task, great care is needed.