—You've got your flat furnished, haven't you?—Yes. I some used furniture at the Sunday Market and it was a real bargain.
________ you happen to see Mary, would you please ask her to come here?
Everyone knows that _______ is dangerous to play with fire, but _______ is difficult is to prevent children from playing with fire.
Not until the early years of the 19th century ________ what heat was.
Tom kept quiet about the accident ________ lose his job.
A driver should __ the road when .