Experts are trying to work out a plan to deal with the problems caused by global warming _________ it is too late.
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.
You will find friendly people ___ you go in China.