As nobody here knows what is wrong with the machine, we send for an engineer to handle the problem.
“Would you like tea _____ coffee?” “_____, thanks.”
The museum is ___ far ____ it will take us half an hour to get there by bus.
We'll go and see the patient ___we are busy.
___ he has finished writing the novel is unknown.
___ it was already dark, they went on working in the fields.