She keeps a supply of candles in the kitchen in case of power ______.
----Do you know how to learn English well? ________. ----Why? Don’t you think English is quite interesting?
He is really an excellent doctor and he is____to becoming an expert in this field.
One of the tourists ______ from the tour group. That was why the tour guide lost his temper.
After all that hard work, you really____a three-day holiday.
Whether by accident or____, he arrived too late to help us.