The science of computer, _____rapid progress has been made in recent years, is the most important of all science.
The truck ran down the hill, and the driver _____, according to the local newspaper, to have been killed.
This is not an economical way to get more water; ________, it is very expensive.
—Which of these two books will you take?—I’ll take ______, in case the journey is boring.
I know this is not quite the right word, but I can’t be bothered to think of _____.
His landlady gave him a week's _____ to leave the flat.