Not until the early years of the 19th century ________ what heat was.
The classroom is big enough ____, but we’ll have to move if we have more students.
—Can the project be finished as planned? —Sure, ____ it completed in time, we’ll work two more hours a day.
Father ____ for London on business upon my arrival, so I didn’t see him.
The dictionary is being printed and it will soon____.
Mum is coming. What present ____ for your birthday?